diff --git a/AppMobile/app/build.gradle b/AppMobile/app/build.gradle
index 605d18c..f33ddd8 100644
--- a/AppMobile/app/build.gradle
+++ b/AppMobile/app/build.gradle
@@ -34,14 +34,26 @@ android {
 dependencies {
     implementation(platform("org.jetbrains.kotlin:kotlin-bom:1.8.0"))
     implementation 'androidx.appcompat:appcompat:1.6.1'
-    implementation 'com.google.android.material:material:1.9.0'
+    implementation 'com.google.android.material:material:1.10.0'
     implementation 'androidx.appcompat:appcompat:1.6.1'
-    implementation 'com.google.android.material:material:1.9.0'
     implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
     implementation 'androidx.lifecycle:lifecycle-livedata-ktx:2.6.2'
     implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.6.2'
-    implementation 'androidx.navigation:navigation-fragment:2.7.3'
-    implementation 'androidx.navigation:navigation-ui:2.7.3'
+    implementation 'androidx.navigation:navigation-fragment:2.7.4'
+    implementation 'androidx.navigation:navigation-ui:2.7.4'
+
+    // Room
+    def room_version = "2.5.0"
+    implementation "androidx.room:room-runtime:$room_version"
+    annotationProcessor "androidx.room:room-compiler:$room_version"
+    // optional - Paging 3 Integration
+    implementation "androidx.room:room-paging:$room_version"
+    // optional - RxJava3 support for Room
+    implementation "androidx.room:room-rxjava3:$room_version"
+    implementation 'io.reactivex.rxjava3:rxandroid:3.0.2'
+    // optional - Test helpers
+    testImplementation "androidx.room:room-testing:$room_version"
+
     testImplementation 'junit:junit:4.13.2'
     androidTestImplementation 'androidx.test.ext:junit:1.1.5'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.5.1'
diff --git a/AppMobile/app/src/main/java/com/example/appmobile/models/AppDatabase.java b/AppMobile/app/src/main/java/com/example/appmobile/models/AppDatabase.java
new file mode 100644
index 0000000..a8ff2ad
--- /dev/null
+++ b/AppMobile/app/src/main/java/com/example/appmobile/models/AppDatabase.java
@@ -0,0 +1,19 @@
+package com.example.appmobile.models;
+
+import androidx.room.Database;
+import androidx.room.RoomDatabase;
+
+import com.example.appmobile.models.Category.Category;
+import com.example.appmobile.models.Category.CategoryDao;
+import com.example.appmobile.models.Task.Task;
+import com.example.appmobile.models.Task.TaskDao;
+import com.example.appmobile.models.User.User;
+import com.example.appmobile.models.User.UserDao;
+
+@Database(entities = {User.class, Task.class, Category.class}, version = 1, exportSchema = false)
+public abstract class AppDatabase extends RoomDatabase {
+    public abstract UserDao userDao ();
+
+    public abstract TaskDao taskDao ();
+    public abstract CategoryDao categoryDao ();
+}
\ No newline at end of file
diff --git a/AppMobile/app/src/main/java/com/example/appmobile/models/Category/Category.java b/AppMobile/app/src/main/java/com/example/appmobile/models/Category/Category.java
new file mode 100644
index 0000000..6d33346
--- /dev/null
+++ b/AppMobile/app/src/main/java/com/example/appmobile/models/Category/Category.java
@@ -0,0 +1,37 @@
+package com.example.appmobile.models.Category;
+
+import androidx.annotation.NonNull;
+import androidx.room.Entity;
+import androidx.room.PrimaryKey;
+
+@Entity(tableName = "categories")
+public class Category {
+    @NonNull
+    @PrimaryKey(autoGenerate = true)
+    public Long id;
+    @NonNull
+    public String name;
+
+    public Category(@NonNull Long id, @NonNull String name) {
+        this.id = id;
+        this.name = name;
+    }
+
+    public Category(@NonNull String name) {
+        this.name = name;
+    }
+
+    @NonNull
+    public Long getId() {
+        return id;
+    }
+
+    @NonNull
+    public String getName() {
+        return name;
+    }
+
+    public void setName(@NonNull String name) {
+        this.name = name;
+    }
+}
diff --git a/AppMobile/app/src/main/java/com/example/appmobile/models/Category/CategoryDao.java b/AppMobile/app/src/main/java/com/example/appmobile/models/Category/CategoryDao.java
new file mode 100644
index 0000000..33473bf
--- /dev/null
+++ b/AppMobile/app/src/main/java/com/example/appmobile/models/Category/CategoryDao.java
@@ -0,0 +1,33 @@
+package com.example.appmobile.models.Category;
+
+import androidx.room.Dao;
+import androidx.room.Delete;
+import androidx.room.Insert;
+import androidx.room.Query;
+import androidx.room.Update;
+
+import java.util.List;
+
+import io.reactivex.rxjava3.core.Completable;
+import io.reactivex.rxjava3.core.Single;
+
+@Dao
+public interface CategoryDao {
+    @Query("select * from categories")
+    Single<List<Category>> getAll();
+
+    @Query("select * from categories where categories.id = :id")
+    Single<Category> get(Long id);
+
+    @Insert
+    Completable insert(Category category);
+
+    @Insert
+    Completable insertAll(Category... categories);
+
+    @Update
+    Completable update(Category categories);
+
+    @Delete
+    Completable delete(Category categories);
+}
diff --git a/AppMobile/app/src/main/java/com/example/appmobile/models/Category/CategoryWithTasks.java b/AppMobile/app/src/main/java/com/example/appmobile/models/Category/CategoryWithTasks.java
new file mode 100644
index 0000000..7335c24
--- /dev/null
+++ b/AppMobile/app/src/main/java/com/example/appmobile/models/Category/CategoryWithTasks.java
@@ -0,0 +1,19 @@
+package com.example.appmobile.models.Category;
+
+import androidx.room.Embedded;
+import androidx.room.Relation;
+
+import com.example.appmobile.models.Task.Task;
+import com.example.appmobile.models.User.User;
+
+import java.util.List;
+
+public class CategoryWithTasks {
+    @Embedded
+    public User user;
+    @Relation(
+            parentColumn = "id",
+            entityColumn = "categoryId"
+    )
+    public List<Task> tasks;
+}
diff --git a/AppMobile/app/src/main/java/com/example/appmobile/models/Database.java b/AppMobile/app/src/main/java/com/example/appmobile/models/Database.java
new file mode 100644
index 0000000..a2513eb
--- /dev/null
+++ b/AppMobile/app/src/main/java/com/example/appmobile/models/Database.java
@@ -0,0 +1,63 @@
+package com.example.appmobile.models;
+
+import android.content.Context;
+import android.util.Log;
+
+import androidx.annotation.NonNull;
+import androidx.room.Room;
+import androidx.room.RoomDatabase;
+import androidx.sqlite.db.SupportSQLiteDatabase;
+
+import com.example.appmobile.models.Category.Category;
+import com.example.appmobile.models.Task.Task;
+import com.example.appmobile.models.User.User;
+
+import java.util.concurrent.Executors;
+
+public final class Database {
+    private static final String DB_NAME = "TODOKA";
+    private static volatile AppDatabase database;
+
+    private Database() {
+    }
+
+    private static void populateDatabase(Context applicationContext) {
+        User user = new User("Ino", "ino@gmail.com", "qw");
+        Category category1 = new Category("Учеба");
+        Category category2 = new Category("Дом");
+
+        Task t1 = new Task("Лабы", "сделать лабы по всем предметам", false, user, category1);
+        Task t2 = new Task("Уборка", "генеральная уборка в квартире", true, user, category2);
+        Task t3 = new Task("Продукты", "купить молоко и хлеб", false, user, category2);
+        Task t4 = new Task("Отчеты", "сделать все нужные отчеты по лабам", false, user, category1);
+        Task t5 = new Task("Бег", "3 км", true, user, category2);
+        Task t6 = new Task("Белочки", "пойти покормить белочек", false, user, category2);
+
+        getDatabase(applicationContext).userDao().insert(user).subscribe().dispose();
+        getDatabase(applicationContext).categoryDao().insertAll(category1, category2).subscribe().dispose();
+        getDatabase(applicationContext).taskDao().insertAll(t1, t2, t3, t4, t5, t6).subscribe().dispose();
+
+        Log.d(Database.class.getSimpleName(), "Populated");
+    }
+
+    public static AppDatabase getDatabase(Context applicationContext) {
+        if (database == null) {
+            synchronized (Database.class) {
+                if (database == null) {
+                    RoomDatabase.Callback populateCallback = new RoomDatabase.Callback() {
+                        public void onCreate(@NonNull SupportSQLiteDatabase db) {
+                            super.onCreate(db);
+                            Executors.newSingleThreadScheduledExecutor()
+                                    .execute(() -> populateDatabase(applicationContext));
+                        }
+                    };
+                    database = Room
+                            .databaseBuilder(applicationContext, AppDatabase.class, DB_NAME)
+                            .addCallback(populateCallback)
+                            .build();
+                }
+            }
+        }
+        return database;
+    }
+}
diff --git a/AppMobile/app/src/main/java/com/example/appmobile/models/Task/Task.java b/AppMobile/app/src/main/java/com/example/appmobile/models/Task/Task.java
new file mode 100644
index 0000000..7b0d587
--- /dev/null
+++ b/AppMobile/app/src/main/java/com/example/appmobile/models/Task/Task.java
@@ -0,0 +1,119 @@
+package com.example.appmobile.models.Task;
+
+import androidx.annotation.NonNull;
+import androidx.room.ColumnInfo;
+import androidx.room.Entity;
+import androidx.room.ForeignKey;
+import androidx.room.PrimaryKey;
+
+import com.example.appmobile.models.Category.Category;
+import com.example.appmobile.models.User.User;
+
+@Entity(tableName = "tasks", foreignKeys = {
+        @ForeignKey(
+                entity = User.class,
+                parentColumns = {"id"},
+                childColumns = {"group_id"},
+                onDelete = ForeignKey.CASCADE,
+                onUpdate = ForeignKey.CASCADE
+        ),
+        @ForeignKey(
+                entity = Category.class,
+                parentColumns = {"id"},
+                childColumns = {"category_id"},
+                onDelete = ForeignKey.CASCADE,
+                onUpdate = ForeignKey.CASCADE
+        )
+})
+public class Task {
+    @NonNull
+    @PrimaryKey(autoGenerate = true)
+    public Long id;
+    @NonNull
+    public String title;
+    @NonNull
+    public String description;
+    @NonNull
+    public boolean close;
+    @NonNull
+    @ColumnInfo(name = "user_id", index = true)
+    public Long userId;
+    @NonNull
+    @ColumnInfo(name = "category_id", index = true)
+    public Long categoryId;
+
+    public Task(@NonNull Long id,
+                @NonNull String title,
+                @NonNull String description,
+                boolean close,
+                @NonNull Long userId,
+                @NonNull Long categoryId) {
+        this.id = id;
+        this.title = title;
+        this.description = description;
+        this.close = close;
+        this.userId = userId;
+        this.categoryId = categoryId;
+    }
+
+    public Task(@NonNull String title,
+                @NonNull String description,
+                boolean close,
+                @NonNull User user,
+                @NonNull Category category) {
+        this.title = title;
+        this.description = description;
+        this.close = close;
+        this.userId = user.getId();
+        this.categoryId = category.getId();
+    }
+
+    @NonNull
+    public Long getId() {
+        return id;
+    }
+
+    @NonNull
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(@NonNull String title) {
+        this.title = title;
+    }
+
+    @NonNull
+    public String getDescription() {
+        return description;
+    }
+
+    public void setDescription(@NonNull String description) {
+        this.description = description;
+    }
+
+    public boolean isClose() {
+        return close;
+    }
+
+    public void setClose(boolean close) {
+        this.close = close;
+    }
+
+    @NonNull
+    public Long getUserId() {
+        return userId;
+    }
+
+    public void setUserId(@NonNull Long userId) {
+        this.userId = userId;
+    }
+
+    @NonNull
+    public Long getCategoryId() {
+        return categoryId;
+    }
+
+    public void setCategoryId(@NonNull Long categoryId) {
+        this.categoryId = categoryId;
+    }
+}
diff --git a/AppMobile/app/src/main/java/com/example/appmobile/models/Task/TaskDao.java b/AppMobile/app/src/main/java/com/example/appmobile/models/Task/TaskDao.java
new file mode 100644
index 0000000..05a97fe
--- /dev/null
+++ b/AppMobile/app/src/main/java/com/example/appmobile/models/Task/TaskDao.java
@@ -0,0 +1,33 @@
+package com.example.appmobile.models.Task;
+
+import androidx.room.Dao;
+import androidx.room.Delete;
+import androidx.room.Insert;
+import androidx.room.Query;
+import androidx.room.Update;
+
+import java.util.List;
+
+import io.reactivex.rxjava3.core.Completable;
+import io.reactivex.rxjava3.core.Single;
+
+@Dao
+public interface TaskDao {
+    @Query("select * from tasks")
+    Single<List<Task>> getAll();
+
+    @Query("select * from tasks where tasks.id = :id")
+    Single<Task> get(Long id);
+
+    @Insert
+    Completable insert(Task task);
+
+    @Insert
+    Completable insertAll(Task... tasks);
+
+    @Update
+    Completable update(Task task);
+
+    @Delete
+    Completable delete(Task task);
+}
diff --git a/AppMobile/app/src/main/java/com/example/appmobile/models/User/User.java b/AppMobile/app/src/main/java/com/example/appmobile/models/User/User.java
new file mode 100644
index 0000000..f1db4af
--- /dev/null
+++ b/AppMobile/app/src/main/java/com/example/appmobile/models/User/User.java
@@ -0,0 +1,70 @@
+package com.example.appmobile.models.User;
+
+import androidx.annotation.NonNull;
+import androidx.room.Entity;
+import androidx.room.PrimaryKey;
+
+
+@Entity(tableName = "users")
+public class User {
+    @NonNull
+    @PrimaryKey(autoGenerate = true)
+    public Long id;
+
+    @NonNull
+    public String name;
+    @NonNull
+    public String email;
+    @NonNull
+    public String password;
+
+    public User(@NonNull Long id,
+                @NonNull String name,
+                @NonNull String email,
+                @NonNull String password) {
+        this.id = id;
+        this.name = name;
+        this.email = email;
+        this.password = password;
+    }
+
+    public User(@NonNull String name,
+                @NonNull String email,
+                @NonNull String password) {
+        this.name = name;
+        this.email = email;
+        this.password = password;
+    }
+
+    @NonNull
+    public Long getId() {
+        return id;
+    }
+
+    @NonNull
+    public String getName() {
+        return name;
+    }
+
+    public void setName(@NonNull String name) {
+        this.name = name;
+    }
+
+    @NonNull
+    public String getEmail() {
+        return email;
+    }
+
+    public void setEmail(@NonNull String email) {
+        this.email = email;
+    }
+
+    @NonNull
+    public String getPassword() {
+        return password;
+    }
+
+    public void setPassword(@NonNull String password) {
+        this.password = password;
+    }
+}
diff --git a/AppMobile/app/src/main/java/com/example/appmobile/models/User/UserDao.java b/AppMobile/app/src/main/java/com/example/appmobile/models/User/UserDao.java
new file mode 100644
index 0000000..cd7575b
--- /dev/null
+++ b/AppMobile/app/src/main/java/com/example/appmobile/models/User/UserDao.java
@@ -0,0 +1,33 @@
+package com.example.appmobile.models.User;
+
+import androidx.room.Dao;
+import androidx.room.Delete;
+import androidx.room.Insert;
+import androidx.room.Query;
+import androidx.room.Update;
+
+import java.util.List;
+
+import io.reactivex.rxjava3.core.Completable;
+import io.reactivex.rxjava3.core.Single;
+
+@Dao
+public interface UserDao {
+    @Query("select * from users")
+    Single<List<User>> getAll();
+
+    @Query("select * from users where users.id = :id")
+    Single<User> get(Long id);
+
+    @Insert
+    Completable insert(User user);
+
+    @Insert
+    Completable insertAll(User... users);
+
+    @Update
+    Completable update(User user);
+
+    @Delete
+    Completable delete(User user);
+}
diff --git a/AppMobile/app/src/main/java/com/example/appmobile/models/User/UserWithTasks.java b/AppMobile/app/src/main/java/com/example/appmobile/models/User/UserWithTasks.java
new file mode 100644
index 0000000..fd4fbe5
--- /dev/null
+++ b/AppMobile/app/src/main/java/com/example/appmobile/models/User/UserWithTasks.java
@@ -0,0 +1,17 @@
+package com.example.appmobile.models.User;
+
+import androidx.room.Embedded;
+import androidx.room.Relation;
+
+import com.example.appmobile.models.Task.Task;
+
+import java.util.List;
+
+public class UserWithTasks {
+    @Embedded public User user;
+    @Relation(
+            parentColumn = "id",
+            entityColumn = "userId"
+    )
+    public List<Task> tasks;
+}