diff --git a/app/build.gradle.kts b/app/build.gradle.kts
new file mode 100644
index 0000000..201015e
--- /dev/null
+++ b/app/build.gradle.kts
@@ -0,0 +1,93 @@
+plugins {
+    alias(libs.plugins.android.application)
+    alias(libs.plugins.jetbrains.kotlin.android)
+    alias(libs.plugins.hilt)
+    alias(libs.plugins.ksp)
+}
+
+android {
+    namespace = "com.planify.mobile"
+    compileSdk = 34
+
+    defaultConfig {
+        applicationId = "com.planify.mobile"
+        minSdk = 26
+        targetSdk = 34
+        versionCode = 1
+        versionName = "0.1.0"
+        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            isMinifyEnabled = true
+            proguardFiles(getDefaultProguardFile("proguard-android-optimize.txt"), "proguard-rules.pro")
+        }
+    }
+
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_17
+        targetCompatibility = JavaVersion.VERSION_17
+    }
+
+    kotlinOptions {
+        jvmTarget = "17"
+    }
+
+    buildFeatures {
+        compose = true
+    }
+
+    composeOptions {
+        kotlinCompilerExtensionVersion = "1.5.14"
+    }
+}
+
+dependencies {
+    implementation(libs.androidx.core.ktx)
+    implementation(libs.androidx.lifecycle.runtime.ktx)
+    implementation(libs.androidx.lifecycle.viewmodel.compose)
+    implementation(libs.androidx.activity.compose)
+    implementation(platform(libs.androidx.compose.bom))
+    implementation(libs.androidx.ui)
+    implementation(libs.androidx.ui.graphics)
+    implementation(libs.androidx.ui.tooling.preview)
+    implementation(libs.androidx.material3)
+    implementation(libs.androidx.material.icons.extended)
+    implementation(libs.androidx.navigation.compose)
+
+    // Hilt
+    implementation(libs.hilt.android)
+    ksp(libs.hilt.compiler)
+    implementation(libs.hilt.navigation.compose)
+    implementation(libs.hilt.work)
+    ksp(libs.hilt.work.compiler)
+
+    // Room
+    implementation(libs.room.runtime)
+    implementation(libs.room.ktx)
+    ksp(libs.room.compiler)
+
+    // Coroutines
+    implementation(libs.kotlinx.coroutines.android)
+
+    // Network
+    implementation(libs.okhttp)
+    implementation(libs.okhttp.logging)
+
+    // Storage
+    implementation(libs.datastore.preferences)
+    implementation(libs.security.crypto)
+
+    // WorkManager
+    implementation(libs.work.runtime.ktx)
+
+    // Tests
+    testImplementation(libs.junit)
+    androidTestImplementation(libs.androidx.junit)
+    androidTestImplementation(libs.androidx.espresso.core)
+    androidTestImplementation(platform(libs.androidx.compose.bom))
+    androidTestImplementation(libs.androidx.ui.test.junit4)
+    debugImplementation(libs.androidx.ui.tooling)
+    debugImplementation(libs.androidx.ui.test.manifest)
+}
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
new file mode 100644
index 0000000..8c6cf7a
--- /dev/null
+++ b/app/src/main/AndroidManifest.xml
@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
+    <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
+    <uses-permission android:name="android.permission.SCHEDULE_EXACT_ALARM" />
+    <uses-permission android:name="android.permission.USE_EXACT_ALARM" />
+
+    <application
+        android:name=".PlanifyApp"
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.PlanifyMobile">
+
+        <activity
+            android:name=".ui.MainActivity"
+            android:exported="true"
+            android:theme="@style/Theme.PlanifyMobile">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+
+    </application>
+
+</manifest>
diff --git a/app/src/main/java/com/planify/mobile/PlanifyApp.kt b/app/src/main/java/com/planify/mobile/PlanifyApp.kt
new file mode 100644
index 0000000..f087ff7
--- /dev/null
+++ b/app/src/main/java/com/planify/mobile/PlanifyApp.kt
@@ -0,0 +1,19 @@
+package com.planify.mobile
+
+import android.app.Application
+import androidx.hilt.work.HiltWorkerFactory
+import androidx.work.Configuration
+import dagger.hilt.android.HiltAndroidApp
+import javax.inject.Inject
+
+@HiltAndroidApp
+class PlanifyApp : Application(), Configuration.Provider {
+
+    @Inject
+    lateinit var workerFactory: HiltWorkerFactory
+
+    override val workManagerConfiguration: Configuration
+        get() = Configuration.Builder()
+            .setWorkerFactory(workerFactory)
+            .build()
+}
diff --git a/app/src/main/java/com/planify/mobile/di/AppModule.kt b/app/src/main/java/com/planify/mobile/di/AppModule.kt
new file mode 100644
index 0000000..f42ae78
--- /dev/null
+++ b/app/src/main/java/com/planify/mobile/di/AppModule.kt
@@ -0,0 +1,10 @@
+package com.planify.mobile.di
+
+import dagger.Module
+import dagger.hilt.InstallIn
+import dagger.hilt.components.SingletonComponent
+
+@Module
+@InstallIn(SingletonComponent::class)
+object AppModule
+// TODO #5 : fournir AppDatabase, repositories, et client CalDAV
diff --git a/app/src/main/java/com/planify/mobile/ui/MainActivity.kt b/app/src/main/java/com/planify/mobile/ui/MainActivity.kt
new file mode 100644
index 0000000..f866341
--- /dev/null
+++ b/app/src/main/java/com/planify/mobile/ui/MainActivity.kt
@@ -0,0 +1,22 @@
+package com.planify.mobile.ui
+
+import android.os.Bundle
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.activity.enableEdgeToEdge
+import com.planify.mobile.ui.theme.PlanifyTheme
+import dagger.hilt.android.AndroidEntryPoint
+
+@AndroidEntryPoint
+class MainActivity : ComponentActivity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        enableEdgeToEdge()
+        setContent {
+            PlanifyTheme {
+                // TODO #6 : PlanifyNavHost()
+            }
+        }
+    }
+}
diff --git a/app/src/main/java/com/planify/mobile/ui/theme/Theme.kt b/app/src/main/java/com/planify/mobile/ui/theme/Theme.kt
new file mode 100644
index 0000000..594ef8e
--- /dev/null
+++ b/app/src/main/java/com/planify/mobile/ui/theme/Theme.kt
@@ -0,0 +1,36 @@
+package com.planify.mobile.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 LightColorScheme = lightColorScheme()
+private val DarkColorScheme = darkColorScheme()
+
+@Composable
+fun PlanifyTheme(
+    darkTheme: Boolean = isSystemInDarkTheme(),
+    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
+    )
+}
diff --git a/app/src/main/java/com/planify/mobile/ui/theme/Type.kt b/app/src/main/java/com/planify/mobile/ui/theme/Type.kt
new file mode 100644
index 0000000..e1e0b28
--- /dev/null
+++ b/app/src/main/java/com/planify/mobile/ui/theme/Type.kt
@@ -0,0 +1,15 @@
+package com.planify.mobile.ui.theme
+
+import androidx.compose.material3.Typography
+import androidx.compose.ui.text.TextStyle
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.sp
+
+val Typography = Typography(
+    bodyLarge = TextStyle(
+        fontWeight = FontWeight.Normal,
+        fontSize = 16.sp,
+        lineHeight = 24.sp,
+        letterSpacing = 0.5.sp
+    )
+)
diff --git a/build.gradle.kts b/build.gradle.kts
new file mode 100644
index 0000000..0adef57
--- /dev/null
+++ b/build.gradle.kts
@@ -0,0 +1,6 @@
+plugins {
+    alias(libs.plugins.android.application) apply false
+    alias(libs.plugins.jetbrains.kotlin.android) apply false
+    alias(libs.plugins.hilt) apply false
+    alias(libs.plugins.ksp) apply false
+}
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
new file mode 100644
index 0000000..d308142
--- /dev/null
+++ b/gradle/libs.versions.toml
@@ -0,0 +1,58 @@
+[versions]
+agp = "8.4.0"
+kotlin = "1.9.24"
+coreKtx = "1.13.1"
+lifecycleRuntimeKtx = "2.8.3"
+activityCompose = "1.9.0"
+composeBom = "2024.06.00"
+hilt = "2.51.1"
+hiltNavigationCompose = "1.2.0"
+navigationCompose = "2.7.7"
+room = "2.6.1"
+coroutines = "1.8.1"
+okhttp = "4.12.0"
+datastore = "1.1.1"
+securityCrypto = "1.1.0-alpha06"
+workManager = "2.9.0"
+junit = "4.13.2"
+junitExt = "1.2.1"
+espressoCore = "3.6.1"
+
+[libraries]
+androidx-core-ktx = { group = "androidx.core", name = "core-ktx", version.ref = "coreKtx" }
+androidx-lifecycle-runtime-ktx = { group = "androidx.lifecycle", name = "lifecycle-runtime-ktx", version.ref = "lifecycleRuntimeKtx" }
+androidx-lifecycle-viewmodel-compose = { group = "androidx.lifecycle", name = "lifecycle-viewmodel-compose", version.ref = "lifecycleRuntimeKtx" }
+androidx-activity-compose = { group = "androidx.activity", name = "activity-compose", version.ref = "activityCompose" }
+androidx-compose-bom = { group = "androidx.compose", name = "compose-bom", version.ref = "composeBom" }
+androidx-ui = { group = "androidx.compose.ui", name = "ui" }
+androidx-ui-graphics = { group = "androidx.compose.ui", name = "ui-graphics" }
+androidx-ui-tooling = { group = "androidx.compose.ui", name = "ui-tooling" }
+androidx-ui-tooling-preview = { group = "androidx.compose.ui", name = "ui-tooling-preview" }
+androidx-ui-test-manifest = { group = "androidx.compose.ui", name = "ui-test-manifest" }
+androidx-ui-test-junit4 = { group = "androidx.compose.ui", name = "ui-test-junit4" }
+androidx-material3 = { group = "androidx.compose.material3", name = "material3" }
+androidx-material-icons-extended = { group = "androidx.compose.material", name = "material-icons-extended" }
+androidx-navigation-compose = { group = "androidx.navigation", name = "navigation-compose", version.ref = "navigationCompose" }
+hilt-android = { group = "com.google.dagger", name = "hilt-android", version.ref = "hilt" }
+hilt-compiler = { group = "com.google.dagger", name = "hilt-android-compiler", version.ref = "hilt" }
+hilt-navigation-compose = { group = "androidx.hilt", name = "hilt-navigation-compose", version.ref = "hiltNavigationCompose" }
+hilt-work = { group = "androidx.hilt", name = "hilt-work", version.ref = "hiltNavigationCompose" }
+hilt-work-compiler = { group = "androidx.hilt", name = "hilt-compiler", version.ref = "hiltNavigationCompose" }
+room-runtime = { group = "androidx.room", name = "room-runtime", version.ref = "room" }
+room-ktx = { group = "androidx.room", name = "room-ktx", version.ref = "room" }
+room-compiler = { group = "androidx.room", name = "room-compiler", version.ref = "room" }
+kotlinx-coroutines-android = { group = "org.jetbrains.kotlinx", name = "kotlinx-coroutines-android", version.ref = "coroutines" }
+okhttp = { group = "com.squareup.okhttp3", name = "okhttp", version.ref = "okhttp" }
+okhttp-logging = { group = "com.squareup.okhttp3", name = "logging-interceptor", version.ref = "okhttp" }
+datastore-preferences = { group = "androidx.datastore", name = "datastore-preferences", version.ref = "datastore" }
+security-crypto = { group = "androidx.security", name = "security-crypto", version.ref = "securityCrypto" }
+work-runtime-ktx = { group = "androidx.work", name = "work-runtime-ktx", version.ref = "workManager" }
+junit = { group = "junit", name = "junit", version.ref = "junit" }
+androidx-junit = { group = "androidx.test.ext", name = "junit", version.ref = "junitExt" }
+androidx-espresso-core = { group = "androidx.test.espresso", name = "espresso-core", version.ref = "espressoCore" }
+
+[plugins]
+android-application = { id = "com.android.application", version.ref = "agp" }
+jetbrains-kotlin-android = { id = "org.jetbrains.kotlin.android", version.ref = "kotlin" }
+hilt = { id = "com.google.dagger.hilt.android", version.ref = "hilt" }
+ksp = { id = "com.google.devtools.ksp", version = "1.9.24-1.0.20" }
diff --git a/settings.gradle.kts b/settings.gradle.kts
new file mode 100644
index 0000000..654bdd7
--- /dev/null
+++ b/settings.gradle.kts
@@ -0,0 +1,23 @@
+pluginManagement {
+    repositories {
+        google {
+            content {
+                includeGroupByRegex("com\\.android.*")
+                includeGroupByRegex("com\\.google.*")
+                includeGroupByRegex("androidx.*")
+            }
+        }
+        mavenCentral()
+        gradlePluginPortal()
+    }
+}
+dependencyResolutionManagement {
+    repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
+    repositories {
+        google()
+        mavenCentral()
+    }
+}
+
+rootProject.name = "Planify Mobile"
+include(":app")