diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index 96a1cf7..d5f68f3 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -1,5 +1,7 @@
 plugins {
+    composeCompiler
     kotlinAndroid
+    kotlinSerialization version Version.Kotlin.language
     androidApplication
 }
 
@@ -32,6 +34,14 @@ android {
 }
 
 dependencies {
-    defaultLibrary()
+    defaultComposeLibrary()
+    val ktor = "3.3.1"
+    implementation("io.ktor:ktor-client-core:$ktor")
+    implementation("io.ktor:ktor-client-cio:$ktor")
+    implementation("io.ktor:ktor-client-content-negotiation:$ktor")
+    implementation("io.ktor:ktor-serialization-kotlinx-json:$ktor")
+    implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.9.0")
     androidTestImplementation(project(path = ":testLib"))
+    androidTestImplementation("io.github.kakaocup:compose:1.0.0")
+    androidTestImplementation("com.squareup.okhttp3:mockwebserver:4.12.0")
 }
\ No newline at end of file
diff --git a/app/src/androidTest/java/ru/myitschool/work/Tests.kt b/app/src/androidTest/java/ru/myitschool/work/Tests.kt
new file mode 100755
index 0000000..7774de8
--- /dev/null
+++ b/app/src/androidTest/java/ru/myitschool/work/Tests.kt
@@ -0,0 +1,229 @@
+@file:OptIn(ExperimentalTestApi::class)
+
+package ru.myitschool.work
+
+import androidx.compose.ui.test.ExperimentalTestApi
+import androidx.compose.ui.test.junit4.createAndroidComposeRule
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import io.github.kakaocup.compose.node.element.ComposeScreen.Companion.onComposeScreen
+import org.junit.FixMethodOrder
+import org.junit.Rule
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.junit.runners.MethodSorters
+import ru.myitschool.work.screens.MainScreen
+import ru.myitschool.work.ui.root.RootActivity
+import ru.myitschool.work.utils.MockWebServerRule
+import ru.myitschool.work.utils.Response
+import ru.samsung.test.core.core.BaseTest
+import java.nio.charset.Charset
+
+@RunWith(AndroidJUnit4::class)
+@FixMethodOrder(MethodSorters.NAME_ASCENDING)
+class Tests : BaseTest<RootActivity>(
+    clazz = RootActivity::class.java,
+    isEnabledCompose = true,
+) {
+    @get:Rule
+    val composeTestRule = createAndroidComposeRule<RootActivity>()
+    @get:Rule
+    val serverRule = MockWebServerRule(8090)
+
+    @Test
+    fun aПроверка_контента_на_экране() = runWithInit(1) {
+        serverRule.mockResponses(
+            "/user" to Response(assetFile = "profile.json"),
+            "/user" to Response(assetFile = "profile2.json")
+        )
+        onComposeScreen<MainScreen>(composeTestRule) {
+            step("Нажимаем на кнопку загрузки данных") {
+                loadButton {
+                    assertIsDisplayed()
+                    performClick()
+                }
+            }
+
+            step("Проверяем корректное заполнение контента") {
+                nameText {
+                    assertIsDisplayed()
+                    assertTextEquals("Test Testovich")
+                }
+                list {
+                    firstChild<MainScreen.ListItem> {
+                        roomText.assertTextEquals("row 1")
+                        timeText.assertTextEquals("end row 1")
+                    }
+                    childAt<MainScreen.ListItem>(1) {
+                        roomText.assertTextEquals("row 2")
+                        timeText.assertTextEquals("end row 2")
+                    }
+                }
+            }
+
+            step("Обновляем страницу") {
+                loadButton {
+                    assertIsDisplayed()
+                    performClick()
+                }
+            }
+
+            step("Проверяем корректное заполнение контента") {
+                nameText {
+                    assertIsDisplayed()
+                    assertTextEquals("Ivan Ivanov")
+                }
+                list {
+                    firstChild<MainScreen.ListItem> {
+                        roomText.assertTextEquals("row 3")
+                        timeText.assertTextEquals("end row 3")
+                    }
+                }
+            }
+        }
+    }
+
+    @Test
+    fun bПроверка_добавления_данных() = runWithInit(1) {
+        val postResponseRoom = "Content-Disposition: form-data; name=room\nContent-Length: 8\n\nRoomTest"
+        val postResponseTime = "Content-Disposition: form-data; name=time\nContent-Length: 8\n\nTimeTest"
+        var requestComplete = false
+        serverRule.mockResponses(
+            "/user" to Response(assetFile = "profile.json"),
+            "/book" to Response(statusCode = 200),
+            "/user" to Response(assetFile = "profile2.json"),
+        )
+        serverRule.setRecorderListener { request ->
+            if (request.path == "/book") {
+                val text = request.body.readString(Charset.defaultCharset())
+                    .replace("\r", "")
+                println(text)
+                assert(text.contains(postResponseRoom)) { "Значение Room не найдено" }
+                assert(text.contains(postResponseTime)) { "Значение Time не найдено" }
+                requestComplete = true
+            }
+        }
+        onComposeScreen<MainScreen>(composeTestRule) {
+            step("Нажимаем на кнопку загрузки данных") {
+                loadButton {
+                    assertIsDisplayed()
+                    performClick()
+                }
+            }
+
+            step("Проверяем корректное заполнение контента") {
+                nameText {
+                    assertIsDisplayed()
+                    assertTextEquals("Test Testovich")
+                }
+                list {
+                    firstChild<MainScreen.ListItem> {
+                        roomText.assertTextEquals("row 1")
+                        timeText.assertTextEquals("end row 1")
+                    }
+                    childAt<MainScreen.ListItem>(1) {
+                        roomText.assertTextEquals("row 2")
+                        timeText.assertTextEquals("end row 2")
+                    }
+                }
+            }
+
+            step("Заполняем поля для ввода") {
+                roomInput {
+                    assertIsDisplayed()
+                    performTextInput("RoomTest")
+                }
+                timeInput {
+                    assertIsDisplayed()
+                    performTextInput("TimeTest")
+                }
+                addButton {
+                    assertIsDisplayed()
+                    performClick()
+                }
+            }
+            flakySafely(timeoutMs = 2_000, intervalMs = 100) {
+                assert(requestComplete) { "/book запроса не было" }
+            }
+
+            step("Проверяем обработку результата") {
+                nameText {
+                    assertIsDisplayed()
+                    assertTextEquals("Ivan Ivanov")
+                }
+            }
+        }
+    }
+
+    @Test
+    fun cПроверка_обработки_ошибок() = runWithInit(1) {
+        serverRule.mockResponses(
+            "/user" to Response(assetFile = "error.json", statusCode = 400),
+            "/user" to Response(assetFile = "error2.json", statusCode = 500),
+            "/user" to Response(assetFile = "profile.json"),
+            "/book" to Response(assetFile = "error.json", statusCode = 400)
+        )
+        onComposeScreen<MainScreen>(composeTestRule) {
+            step("Нажимаем на кнопку загрузки данных") {
+                loadButton {
+                    assertIsDisplayed()
+                    performClick()
+                }
+            }
+
+            step("Проверяем ошибку и повторно выполняем запрос") {
+                errorContent {
+                    assertTextEquals("TEST Error 1 TEST")
+                }
+                loadButton {
+                    assertIsDisplayed()
+                    performClick()
+                }
+                errorContent {
+                    assertTextEquals("TEST Error 2 TEST")
+                }
+                loadButton {
+                    assertIsDisplayed()
+                    performClick()
+                }
+            }
+
+            step("Проверяем корректное заполнение контента") {
+                nameText {
+                    assertIsDisplayed()
+                    assertTextEquals("Test Testovich")
+                }
+                list {
+                    firstChild<MainScreen.ListItem> {
+                        roomText.assertTextEquals("row 1")
+                        timeText.assertTextEquals("end row 1")
+                    }
+                    childAt<MainScreen.ListItem>(1) {
+                        roomText.assertTextEquals("row 2")
+                        timeText.assertTextEquals("end row 2")
+                    }
+                }
+            }
+
+            step("Заполняем поля для ввода") {
+                roomInput {
+                    assertIsDisplayed()
+                    performTextInput("RoomTest")
+                }
+                timeInput {
+                    assertIsDisplayed()
+                    performTextInput("TimeTest")
+                }
+                addButton {
+                    assertIsDisplayed()
+                    performClick()
+                }
+            }
+
+            step("Проверяем обработку ошибки") {
+                errorSend {
+                    assertTextEquals("TEST Error 1 TEST")
+                }
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/app/src/androidTest/java/ru/myitschool/work/screens/MainScreen.kt b/app/src/androidTest/java/ru/myitschool/work/screens/MainScreen.kt
new file mode 100755
index 0000000..1f627ba
--- /dev/null
+++ b/app/src/androidTest/java/ru/myitschool/work/screens/MainScreen.kt
@@ -0,0 +1,55 @@
+package ru.myitschool.work.screens
+
+import androidx.compose.ui.semantics.SemanticsNode
+import androidx.compose.ui.test.SemanticsNodeInteractionsProvider
+import androidx.compose.ui.test.hasTestTag
+import com.kaspersky.components.composesupport.core.KNode
+import io.github.kakaocup.compose.node.element.lazylist.KLazyListItemNode
+import io.github.kakaocup.compose.node.element.lazylist.KLazyListNode
+
+class MainScreen(
+    semanticsProvider: SemanticsNodeInteractionsProvider
+) : UiBaseScreen<MainScreen>(semanticsProvider) {
+    val loadButton = child<KNode> {
+        hasTestTag("load_button")
+    }
+    val nameText: KNode = child<KNode> {
+        hasTestTag("name")
+    }
+    val roomInput: KNode = child<KNode> {
+        hasTestTag("input_room")
+    }
+    val timeInput: KNode = child<KNode> {
+        hasTestTag("input_time")
+    }
+    val addButton: KNode = child<KNode> {
+        hasTestTag("add")
+    }
+    val errorContent: KNode = child<KNode> {
+        hasTestTag("error_text_content")
+    }
+    val errorSend: KNode = child<KNode> {
+        hasTestTag("error_text_send")
+    }
+
+    val list = KLazyListNode(
+        semanticsProvider = semanticsProvider,
+        viewBuilderAction = { hasTestTag("booking") },
+        itemTypeBuilder = {
+            itemType(::ListItem)
+        },
+        positionMatcher = { position -> hasTestTag("position=$position") }
+    )
+
+    class ListItem(
+        semanticsNode: SemanticsNode,
+        semanticsProvider: SemanticsNodeInteractionsProvider,
+    ) : KLazyListItemNode<ListItem>(semanticsNode, semanticsProvider) {
+        val roomText: KNode = child {
+            hasTestTag("room")
+        }
+        val timeText: KNode = child {
+            hasTestTag("time")
+        }
+    }
+}
\ No newline at end of file
diff --git a/app/src/androidTest/java/ru/myitschool/work/screens/UiBaseScreen.kt b/app/src/androidTest/java/ru/myitschool/work/screens/UiBaseScreen.kt
new file mode 100755
index 0000000..1a690b7
--- /dev/null
+++ b/app/src/androidTest/java/ru/myitschool/work/screens/UiBaseScreen.kt
@@ -0,0 +1,10 @@
+package ru.myitschool.work.screens
+
+import androidx.compose.ui.test.SemanticsNodeInteractionsProvider
+import io.github.kakaocup.compose.node.element.ComposeScreen
+
+open class UiBaseScreen<out T : ComposeScreen<T>>(
+    semanticsProvider: SemanticsNodeInteractionsProvider
+) : ComposeScreen<T>(
+    semanticsProvider = semanticsProvider
+)
\ No newline at end of file
diff --git a/app/src/androidTest/java/ru/myitschool/work/utils/LocaleRule.kt b/app/src/androidTest/java/ru/myitschool/work/utils/LocaleRule.kt
new file mode 100755
index 0000000..791cebe
--- /dev/null
+++ b/app/src/androidTest/java/ru/myitschool/work/utils/LocaleRule.kt
@@ -0,0 +1,27 @@
+package ru.myitschool.work.utils
+
+import android.app.LocaleManager
+import android.os.Build
+import android.os.LocaleList
+import androidx.appcompat.app.AppCompatDelegate
+import androidx.core.os.LocaleListCompat
+import androidx.test.platform.app.InstrumentationRegistry
+import org.junit.rules.ExternalResource
+import java.util.Locale
+
+class LocaleRule(
+    private val locale: Locale,
+) : ExternalResource() {
+
+    override fun before() {
+        val context = InstrumentationRegistry.getInstrumentation().targetContext
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+            context.getSystemService(LocaleManager::class.java)
+                .applicationLocales = LocaleList(locale)
+        } else {
+            AppCompatDelegate.setApplicationLocales(
+                LocaleListCompat.create(locale)
+            )
+        }
+    }
+}
\ No newline at end of file
diff --git a/app/src/androidTest/java/ru/myitschool/work/utils/MockWebServerRule.kt b/app/src/androidTest/java/ru/myitschool/work/utils/MockWebServerRule.kt
new file mode 100755
index 0000000..bfdce62
--- /dev/null
+++ b/app/src/androidTest/java/ru/myitschool/work/utils/MockWebServerRule.kt
@@ -0,0 +1,86 @@
+package ru.myitschool.work.utils
+
+import okhttp3.mockwebserver.Dispatcher
+import okhttp3.mockwebserver.MockResponse
+import okhttp3.mockwebserver.MockWebServer
+import okhttp3.mockwebserver.RecordedRequest
+import org.junit.rules.TestRule
+import org.junit.runner.Description
+import org.junit.runners.model.Statement
+import java.net.HttpURLConnection
+import java.util.LinkedList
+import java.util.Queue
+
+class MockWebServerRule(private val port: Int) : TestRule {
+    val server: MockWebServer get() = _server
+
+    private lateinit var _server: MockWebServer
+    private val dispatcher = object : Dispatcher() {
+        private val responses = mutableMapOf<String, Queue<Response>>()
+        var requestListener: ((RecordedRequest) -> Unit)? = null
+
+        override fun dispatch(request: RecordedRequest): MockResponse {
+            requestListener?.invoke(request)
+            val response = responses[request.path]?.poll()
+                ?: return MockResponse().apply {
+                    setResponseCode(HttpURLConnection.HTTP_NOT_FOUND)
+                }
+            return MockResponse().apply {
+                setResponseCode(response.statusCode)
+                if (response.assetFile != null) {
+                    val resource = this.javaClass.classLoader
+                        ?.getResourceAsStream(response.assetFile)
+                        ?: throw IllegalStateException("File not found")
+                    setBody(String(resource.readBytes()))
+                    response.contentType?.let { setHeader("Content-Type", it) }
+                }
+            }
+        }
+
+        fun addMockResponse(requestUrl: String, response: Response) {
+            val queue = responses.getOrPut(requestUrl) { LinkedList() }
+            queue.add(response)
+        }
+    }
+
+    override fun apply(base: Statement, description: Description): Statement {
+        return object : Statement() {
+            @Throws(Throwable::class)
+            override fun evaluate() {
+                _server = MockWebServer()
+                _server.dispatcher = dispatcher
+                _server.start(port = port)
+                try {
+                    base.evaluate()
+                } finally {
+                    try {
+                        _server.dispatcher.shutdown()
+                        _server.shutdown()
+                    } catch (e: Throwable) {
+                        e.printStackTrace()
+                    }
+                }
+            }
+        }
+    }
+
+    fun setRecorderListener(listener: (RecordedRequest) -> Unit) {
+        dispatcher.requestListener = listener
+    }
+
+    fun removeRecorderListener() {
+        dispatcher.requestListener = null
+    }
+
+    fun mockResponses(vararg pairs: Pair<String, Response>) {
+        pairs.forEach { (request, response) ->
+            dispatcher.addMockResponse(request, response)
+        }
+    }
+}
+
+data class Response(
+    val assetFile: String? = null,
+    val contentType: String? = "application/json",
+    val statusCode: Int = HttpURLConnection.HTTP_OK,
+)
\ No newline at end of file
diff --git a/app/src/androidTest/resources/error.json b/app/src/androidTest/resources/error.json
new file mode 100755
index 0000000..ea06ac0
--- /dev/null
+++ b/app/src/androidTest/resources/error.json
@@ -0,0 +1,3 @@
+{
+	"error": "TEST Error 1 TEST"
+}
\ No newline at end of file
diff --git a/app/src/androidTest/resources/error2.json b/app/src/androidTest/resources/error2.json
new file mode 100755
index 0000000..155850b
--- /dev/null
+++ b/app/src/androidTest/resources/error2.json
@@ -0,0 +1,3 @@
+{
+	"error": "TEST Error 2 TEST"
+}
\ No newline at end of file
diff --git a/app/src/androidTest/resources/profile.json b/app/src/androidTest/resources/profile.json
new file mode 100755
index 0000000..39249b9
--- /dev/null
+++ b/app/src/androidTest/resources/profile.json
@@ -0,0 +1,13 @@
+{
+	"name": "Test Testovich",
+	"booking": [
+		{
+			"room": "row 1",
+			"time": "end row 1"
+		},
+		{
+			"room": "row 2",
+			"time": "end row 2"
+		}
+	]
+}
\ No newline at end of file
diff --git a/app/src/androidTest/resources/profile2.json b/app/src/androidTest/resources/profile2.json
new file mode 100755
index 0000000..1467fee
--- /dev/null
+++ b/app/src/androidTest/resources/profile2.json
@@ -0,0 +1,9 @@
+{
+	"name": "Ivan Ivanov",
+	"booking": [
+		{
+			"room": "row 3",
+			"time": "end row 3"
+		}
+	]
+}
\ No newline at end of file
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 9ee5c40..5531bab 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -2,6 +2,8 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools">
 
+    <uses-permission android:name="android.permission.INTERNET" />
+
     <application
         android:allowBackup="true"
         android:dataExtractionRules="@xml/data_extraction_rules"
@@ -10,7 +12,19 @@
         android:label="@string/app_name"
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
-        android:theme="@style/Theme.Default"
-        tools:targetApi="31" />
+        android:usesCleartextTraffic="true"
+        tools:targetApi="31">
+        <activity
+            android:name=".ui.root.RootActivity"
+            android:exported="true"
+            android:windowSoftInputMode="adjustResize"
+            android:label="@string/title_activity_root">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
 
 </manifest>
\ No newline at end of file
diff --git a/app/src/main/java/ru/myitschool/work/core/Constants.kt b/app/src/main/java/ru/myitschool/work/core/Constants.kt
new file mode 100644
index 0000000..07707db
--- /dev/null
+++ b/app/src/main/java/ru/myitschool/work/core/Constants.kt
@@ -0,0 +1,9 @@
+package ru.myitschool.work.core
+
+object Constants {
+    const val HOST = "http://localhost:8090"
+    const val USER_URL = "/user"
+    const val FULL_USER_URL = "$HOST$USER_URL"
+    const val BOOK_URL = "/book"
+    const val FULL_BOOK_URL = "$HOST$BOOK_URL"
+}
\ No newline at end of file
diff --git a/app/src/main/java/ru/myitschool/work/domain/entities/BookingEntity.kt b/app/src/main/java/ru/myitschool/work/domain/entities/BookingEntity.kt
new file mode 100644
index 0000000..0bf603d
--- /dev/null
+++ b/app/src/main/java/ru/myitschool/work/domain/entities/BookingEntity.kt
@@ -0,0 +1,6 @@
+package ru.myitschool.work.domain.entities
+
+data class BookingEntity(
+    val roomName: String,
+    val time: String,
+)
\ No newline at end of file
diff --git a/app/src/main/java/ru/myitschool/work/domain/entities/UserEntity.kt b/app/src/main/java/ru/myitschool/work/domain/entities/UserEntity.kt
new file mode 100644
index 0000000..86a9851
--- /dev/null
+++ b/app/src/main/java/ru/myitschool/work/domain/entities/UserEntity.kt
@@ -0,0 +1,6 @@
+package ru.myitschool.work.domain.entities
+
+data class UserEntity(
+    val name: String,
+    val bookingList: List<BookingEntity>
+)
\ No newline at end of file
diff --git a/app/src/main/java/ru/myitschool/work/ui/root/RootActivity.kt b/app/src/main/java/ru/myitschool/work/ui/root/RootActivity.kt
new file mode 100644
index 0000000..cc35f34
--- /dev/null
+++ b/app/src/main/java/ru/myitschool/work/ui/root/RootActivity.kt
@@ -0,0 +1,198 @@
+package ru.myitschool.work.ui.root
+
+import android.os.Bundle
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.activity.enableEdgeToEdge
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.itemsIndexed
+import androidx.compose.material3.Button
+import androidx.compose.material3.CircularProgressIndicator
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextField
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.testTag
+import androidx.compose.ui.unit.dp
+import androidx.lifecycle.viewmodel.compose.viewModel
+import ru.myitschool.work.ui.theme.WorkTheme
+
+class RootActivity : ComponentActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        enableEdgeToEdge()
+        setContent {
+            WorkTheme {
+                Scaffold(modifier = Modifier.fillMaxSize()) { innerPadding ->
+                    Screen(
+                        modifier = Modifier
+                            .fillMaxSize()
+                            .padding(innerPadding)
+                    )
+                }
+            }
+        }
+    }
+}
+
+@Composable
+fun Screen(
+    modifier: Modifier = Modifier,
+    viewModel: RootViewModel = viewModel()
+) {
+    val state by viewModel.uiState.collectAsState()
+
+    when (val currentState = state) {
+        is RootState.Content -> {
+            Column(
+                modifier = modifier,
+            ) {
+                Row(
+                    modifier = Modifier.padding(horizontal = 8.dp),
+                    verticalAlignment = Alignment.CenterVertically,
+                ) {
+                    Text(
+                        modifier = Modifier.testTag("name").weight(1f),
+                        text = currentState.userEntity.name,
+                        style = MaterialTheme.typography.headlineSmall
+                    )
+                    ButtonGetData(viewModel)
+                }
+                LazyColumn(
+                    modifier = Modifier.testTag("booking").weight(1f)
+                ) {
+                    itemsIndexed(currentState.userEntity.bookingList) { index, book ->
+                        Row(
+                            modifier = Modifier
+                                .testTag("position=$index")
+                                .padding(vertical = 16.dp, horizontal = 8.dp),
+                            verticalAlignment = Alignment.CenterVertically
+                        ) {
+                            Text(
+                                modifier = Modifier.testTag("room").weight(1f),
+                                text = book.roomName,
+                                style = MaterialTheme.typography.bodyLarge
+                            )
+                            Text(
+                                modifier = Modifier.testTag("time"),
+                                text = book.time,
+                                style = MaterialTheme.typography.bodySmall
+                            )
+                        }
+                    }
+                }
+                Row(
+                    modifier = Modifier.padding(horizontal = 8.dp),
+                    verticalAlignment = Alignment.CenterVertically,
+                ) {
+                    var roomText by remember { mutableStateOf("") }
+                    var timeText by remember { mutableStateOf("") }
+
+                    Column(modifier = Modifier.weight(1f)) {
+                        TextField(
+                            modifier = Modifier.testTag("input_room").fillMaxWidth(),
+                            value = roomText,
+                            onValueChange = { roomText = it },
+                            label = { Text("Room") }
+                        )
+                        TextField(
+                            modifier = Modifier
+                                .testTag("input_time")
+                                .padding(top = 8.dp)
+                                .fillMaxWidth(),
+                            value = timeText,
+                            onValueChange = { timeText = it },
+                            label = { Text("Time") }
+                        )
+                    }
+                    Column(
+                        modifier = Modifier.padding(start = 8.dp),
+                    ) {
+                        Button(
+                            modifier = Modifier.testTag("add"),
+                            onClick = {
+                                viewModel.onIntent(
+                                    RootIntent.AddBook(room = roomText, time = timeText)
+                                )
+                                roomText = ""
+                                timeText = ""
+                            }
+                        ) {
+                            Text(text = "Add")
+                        }
+                        if (currentState.errorText != null) {
+                            Text(
+                                modifier = Modifier.testTag("error_text_send"),
+                                text = currentState.errorText
+                            )
+                        }
+                    }
+                }
+            }
+
+        }
+
+        is RootState.Error -> {
+            Column(
+                modifier = modifier,
+                verticalArrangement = Arrangement.Center,
+                horizontalAlignment = Alignment.CenterHorizontally,
+            ) {
+                Text(
+                    modifier = Modifier.testTag("error_text_content"),
+                    text = currentState.message
+                )
+                ButtonGetData(viewModel)
+            }
+        }
+
+        is RootState.Loading -> {
+            Box(
+                modifier = modifier,
+                contentAlignment = Alignment.Center,
+            ) {
+                CircularProgressIndicator(modifier = Modifier.size(64.dp))
+            }
+        }
+
+        is RootState.NotLoaded -> {
+            Box(
+                modifier = modifier,
+                contentAlignment = Alignment.Center,
+            ) {
+                ButtonGetData(viewModel)
+            }
+
+        }
+    }
+}
+
+@Composable
+private fun ButtonGetData(
+    viewModel: RootViewModel
+) {
+    Button(
+        modifier = Modifier.testTag("load_button"),
+        onClick = { viewModel.onIntent(RootIntent.LoadData) }
+    ) {
+        Text(
+            text = "Get load"
+        )
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/ru/myitschool/work/ui/root/RootIntent.kt b/app/src/main/java/ru/myitschool/work/ui/root/RootIntent.kt
new file mode 100644
index 0000000..9804e07
--- /dev/null
+++ b/app/src/main/java/ru/myitschool/work/ui/root/RootIntent.kt
@@ -0,0 +1,9 @@
+package ru.myitschool.work.ui.root
+
+sealed interface RootIntent {
+    data object LoadData: RootIntent
+    data class AddBook(
+        val room: String,
+        val time: String
+    ): RootIntent
+}
\ No newline at end of file
diff --git a/app/src/main/java/ru/myitschool/work/ui/root/RootState.kt b/app/src/main/java/ru/myitschool/work/ui/root/RootState.kt
new file mode 100644
index 0000000..1c5d32f
--- /dev/null
+++ b/app/src/main/java/ru/myitschool/work/ui/root/RootState.kt
@@ -0,0 +1,13 @@
+package ru.myitschool.work.ui.root
+
+import ru.myitschool.work.domain.entities.UserEntity
+
+sealed interface RootState {
+    data object NotLoaded: RootState
+    data object Loading: RootState
+    data class Error(val message: String): RootState
+    data class Content(
+        val userEntity: UserEntity,
+        val errorText: String?,
+    ): RootState
+}
\ No newline at end of file
diff --git a/app/src/main/java/ru/myitschool/work/ui/root/RootViewModel.kt b/app/src/main/java/ru/myitschool/work/ui/root/RootViewModel.kt
new file mode 100644
index 0000000..d95ac89
--- /dev/null
+++ b/app/src/main/java/ru/myitschool/work/ui/root/RootViewModel.kt
@@ -0,0 +1,68 @@
+package ru.myitschool.work.ui.root
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.update
+import kotlinx.coroutines.launch
+import ru.myitschool.work.data.AppRepository
+import ru.myitschool.work.domain.AddBookUseCase
+import ru.myitschool.work.domain.GetUserDataUseCase
+
+class RootViewModel : ViewModel() {
+    private val getUserDataUseCase by lazy {
+        GetUserDataUseCase(
+            repository = AppRepository
+        )
+    }
+    private val addBookUseCase by lazy {
+        AddBookUseCase(
+            repository = AppRepository
+        )
+    }
+    private val _uiState = MutableStateFlow<RootState>(RootState.NotLoaded)
+    val uiState: StateFlow<RootState> = _uiState.asStateFlow()
+
+    fun onIntent(intent: RootIntent) {
+        when (intent) {
+            is RootIntent.LoadData -> loadData()
+            is RootIntent.AddBook -> addBook(intent)
+        }
+    }
+
+    private fun loadData() {
+        viewModelScope.launch {
+            _uiState.emit(RootState.Loading)
+            getUserDataUseCase.invoke().fold(
+                onSuccess = { value ->
+                    _uiState.emit(RootState.Content(userEntity = value, errorText = null))
+                },
+                onFailure = { error ->
+                    _uiState.emit(RootState.Error(error.message.orEmpty()))
+                }
+            )
+        }
+    }
+
+    private fun addBook(intent: RootIntent.AddBook) {
+        viewModelScope.launch {
+            addBookUseCase.invoke(
+                room = intent.room,
+                time = intent.time
+            ).fold(
+                onSuccess = {
+                    loadData()
+                },
+                onFailure = { error ->
+                    _uiState.update { state ->
+                        (state as? RootState.Content)?.copy(
+                            errorText = error.message
+                        ) ?: state
+                    }
+                }
+            )
+        }
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/ru/myitschool/work/ui/theme/Color.kt b/app/src/main/java/ru/myitschool/work/ui/theme/Color.kt
new file mode 100644
index 0000000..22226f4
--- /dev/null
+++ b/app/src/main/java/ru/myitschool/work/ui/theme/Color.kt
@@ -0,0 +1,11 @@
+package ru.myitschool.work.ui.theme
+
+import androidx.compose.ui.graphics.Color
+
+val Purple80 = Color(0xFFD0BCFF)
+val PurpleGrey80 = Color(0xFFCCC2DC)
+val Pink80 = Color(0xFFEFB8C8)
+
+val Purple40 = Color(0xFF6650a4)
+val PurpleGrey40 = Color(0xFF625b71)
+val Pink40 = Color(0xFF7D5260)
\ No newline at end of file
diff --git a/app/src/main/java/ru/myitschool/work/ui/theme/Theme.kt b/app/src/main/java/ru/myitschool/work/ui/theme/Theme.kt
new file mode 100644
index 0000000..d9cc58f
--- /dev/null
+++ b/app/src/main/java/ru/myitschool/work/ui/theme/Theme.kt
@@ -0,0 +1,57 @@
+package ru.myitschool.work.ui.theme
+
+import android.os.Build
+import androidx.compose.foundation.isSystemInDarkTheme
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.darkColorScheme
+import androidx.compose.material3.dynamicDarkColorScheme
+import androidx.compose.material3.dynamicLightColorScheme
+import androidx.compose.material3.lightColorScheme
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.platform.LocalContext
+
+private val DarkColorScheme = darkColorScheme(
+    primary = Purple80,
+    secondary = PurpleGrey80,
+    tertiary = Pink80
+)
+
+private val LightColorScheme = lightColorScheme(
+    primary = Purple40,
+    secondary = PurpleGrey40,
+    tertiary = Pink40
+
+    /* Other default colors to override
+    background = Color(0xFFFFFBFE),
+    surface = Color(0xFFFFFBFE),
+    onPrimary = Color.White,
+    onSecondary = Color.White,
+    onTertiary = Color.White,
+    onBackground = Color(0xFF1C1B1F),
+    onSurface = Color(0xFF1C1B1F),
+    */
+)
+
+@Composable
+fun WorkTheme(
+    darkTheme: Boolean = isSystemInDarkTheme(),
+    // Dynamic color is available on Android 12+
+    dynamicColor: Boolean = true,
+    content: @Composable () -> Unit
+) {
+    val colorScheme = when {
+        dynamicColor && Build.VERSION.SDK_INT >= Build.VERSION_CODES.S -> {
+            val context = LocalContext.current
+            if (darkTheme) dynamicDarkColorScheme(context) else dynamicLightColorScheme(context)
+        }
+
+        darkTheme -> DarkColorScheme
+        else -> LightColorScheme
+    }
+
+    MaterialTheme(
+        colorScheme = colorScheme,
+        typography = Typography,
+        content = content
+    )
+}
\ No newline at end of file
diff --git a/app/src/main/java/ru/myitschool/work/ui/theme/Type.kt b/app/src/main/java/ru/myitschool/work/ui/theme/Type.kt
new file mode 100644
index 0000000..61b2923
--- /dev/null
+++ b/app/src/main/java/ru/myitschool/work/ui/theme/Type.kt
@@ -0,0 +1,34 @@
+package ru.myitschool.work.ui.theme
+
+import androidx.compose.material3.Typography
+import androidx.compose.ui.text.TextStyle
+import androidx.compose.ui.text.font.FontFamily
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.sp
+
+// Set of Material typography styles to start with
+val Typography = Typography(
+    bodyLarge = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.Normal,
+        fontSize = 16.sp,
+        lineHeight = 24.sp,
+        letterSpacing = 0.5.sp
+    )
+    /* Other default text styles to override
+    titleLarge = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.Normal,
+        fontSize = 22.sp,
+        lineHeight = 28.sp,
+        letterSpacing = 0.sp
+    ),
+    labelSmall = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.Medium,
+        fontSize = 11.sp,
+        lineHeight = 16.sp,
+        letterSpacing = 0.5.sp
+    )
+    */
+)
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 96034ac..e88fc68 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -1,3 +1,4 @@
 <resources>
     <string name="app_name">Work</string>
+    <string name="title_activity_root">NTO-2025</string>
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/values/themes.xml b/app/src/main/res/values/themes.xml
deleted file mode 100644
index 89e63d4..0000000
--- a/app/src/main/res/values/themes.xml
+++ /dev/null
@@ -1,16 +0,0 @@
-<resources xmlns:tools="http://schemas.android.com/tools">
-    <!-- Base application theme. -->
-    <style name="Theme.Default" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
-        <!-- Primary brand color. -->
-        <item name="colorPrimary">@color/purple_500</item>
-        <item name="colorPrimaryVariant">@color/purple_700</item>
-        <item name="colorOnPrimary">@color/white</item>
-        <!-- Secondary brand color. -->
-        <item name="colorSecondary">@color/teal_200</item>
-        <item name="colorSecondaryVariant">@color/teal_700</item>
-        <item name="colorOnSecondary">@color/black</item>
-        <!-- Status bar color. -->
-        <item name="android:statusBarColor">?attr/colorPrimaryVariant</item>
-        <!-- Customize your theme here. -->
-    </style>
-</resources>
\ No newline at end of file
diff --git a/build.gradle.kts b/build.gradle.kts
index 64d8748..572c00e 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -2,4 +2,6 @@
 plugins {
     androidApplication version Version.agp apply false
     kotlinJvm version Version.Kotlin.language apply false
+    kotlinAndroid version Version.Kotlin.language apply false
+    composeCompiler version Version.Kotlin.language apply false
 }
\ No newline at end of file
diff --git a/buildSrc b/buildSrc
index d959060..d302d63 160000
--- a/buildSrc
+++ b/buildSrc
@@ -1 +1 @@
-Subproject commit d9590600045906edeb852eaa3f0b9bf7d1875813
+Subproject commit d302d630f12102c7159e586b57c88cfedd17e65e
diff --git a/gradle b/gradle
index d115144..a28ff9e 160000
--- a/gradle
+++ b/gradle
@@ -1 +1 @@
-Subproject commit d11514433239954cc4fa8b336c0348daf8ff7268
+Subproject commit a28ff9e07699e093bfecb2b1fab86e07cb768915
diff --git a/testLib b/testLib
index 6301091..b6291e4 160000
--- a/testLib
+++ b/testLib
@@ -1 +1 @@
-Subproject commit 63010918ee3ab9aa7d446f742b35164823116ecc
+Subproject commit b6291e4770c62ef8a9c23520a77aebf7f2678aa5