diff --git a/src/database/appactivity.ts b/src/database/appactivity.ts
new file mode 100644
index 0000000..515a0fb
--- /dev/null
+++ b/src/database/appactivity.ts
@@ -0,0 +1,61 @@
+/*
+ * server component for the TimeLimit App
+ * Copyright (C) 2019 Jonas Lochmann
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import * as Sequelize from 'sequelize'
+import { familyIdColumn, idWithinFamilyColumn, optionalLabelColumn } from './columns'
+import { SequelizeAttributes } from './types'
+
+export interface AppActivityAttributes {
+  familyId: string
+  deviceId: string
+  packageName: string
+  activityName: string
+  title: string
+}
+
+export type AppActivityInstance = Sequelize.Instance<AppActivityAttributes> & AppActivityAttributes
+export type AppActivityModel = Sequelize.Model<AppActivityInstance, AppActivityAttributes>
+
+export const attributes: SequelizeAttributes<AppActivityAttributes> = {
+  familyId: {
+    ...familyIdColumn,
+    primaryKey: true
+  },
+  deviceId: {
+    ...idWithinFamilyColumn,
+    primaryKey: true
+  },
+  packageName: {
+    type: Sequelize.STRING,
+    allowNull: false,
+    validate: {
+      notEmpty: true
+    },
+    primaryKey: true
+  },
+  activityName: {
+    type: Sequelize.STRING,
+    allowNull: false,
+    validate: {
+      notEmpty: true
+    },
+    primaryKey: true
+  },
+  title: { ...optionalLabelColumn }
+}
+
+export const createAppActivityModel = (sequelize: Sequelize.Sequelize): AppActivityModel => sequelize.define<AppActivityInstance, AppActivityAttributes>('AppActivity', attributes)
diff --git a/src/database/device.ts b/src/database/device.ts
index c1e7e99..949737d 100644
--- a/src/database/device.ts
+++ b/src/database/device.ts
@@ -80,9 +80,14 @@ export interface DeviceAttributesVersion8 {
   wasAsEnabled: boolean
 }
 
+export interface DeviceAttributesVersion9 {
+  activityLevelBlocking: boolean
+}
+
 export type DeviceAttributes = DeviceAttributesVersion1 & DeviceAttributesVersion2 &
   DeviceAttributesVersion3 & DeviceAttributesVersion4 & DeviceAttributesVersion5 &
-  DeviceAttributesVersion6 & DeviceAttributesVersion7 & DeviceAttributesVersion8
+  DeviceAttributesVersion6 & DeviceAttributesVersion7 & DeviceAttributesVersion8 &
+  DeviceAttributesVersion9
 
 export type DeviceInstance = Sequelize.Instance<DeviceAttributes> & DeviceAttributes
 export type DeviceModel = Sequelize.Model<DeviceInstance, DeviceAttributes>
@@ -208,6 +213,13 @@ export const attributesVersion8: SequelizeAttributes<DeviceAttributesVersion8> =
   }
 }
 
+export const attributesVersion9: SequelizeAttributes<DeviceAttributesVersion9> = {
+  activityLevelBlocking: {
+    ...booleanColumn,
+    defaultValue: false
+  }
+}
+
 export const attributes: SequelizeAttributes<DeviceAttributes> = {
   ...attributesVersion1,
   ...attributesVersion2,
@@ -216,7 +228,8 @@ export const attributes: SequelizeAttributes<DeviceAttributes> = {
   ...attributesVersion5,
   ...attributesVersion6,
   ...attributesVersion7,
-  ...attributesVersion8
+  ...attributesVersion8,
+  ...attributesVersion9
 }
 
 export const createDeviceModel = (sequelize: Sequelize.Sequelize): DeviceModel => sequelize.define<DeviceInstance, DeviceAttributes>('Device', attributes)
diff --git a/src/database/index.ts b/src/database/index.ts
index 94c8103..5539239 100644
--- a/src/database/index.ts
+++ b/src/database/index.ts
@@ -18,6 +18,7 @@
 import * as Sequelize from 'sequelize'
 import { AddDeviceTokenModel, createAddDeviceTokenModel } from './adddevicetoken'
 import { AppModel, createAppModel } from './app'
+import { AppActivityModel, createAppActivityModel } from './appactivity'
 import { AuthTokenModel, createAuthtokenModel } from './authtoken'
 import { CategoryModel, createCategoryModel } from './category'
 import { CategoryAppModel, createCategoryAppModel } from './categoryapp'
@@ -35,6 +36,7 @@ export interface Database {
   addDeviceToken: AddDeviceTokenModel
   authtoken: AuthTokenModel
   app: AppModel
+  appActivity: AppActivityModel
   category: CategoryModel
   categoryApp: CategoryAppModel
   device: DeviceModel
@@ -52,6 +54,7 @@ const createDatabase = (sequelize: Sequelize.Sequelize): Database => ({
   addDeviceToken: createAddDeviceTokenModel(sequelize),
   authtoken: createAuthtokenModel(sequelize),
   app: createAppModel(sequelize),
+  appActivity: createAppActivityModel(sequelize),
   category: createCategoryModel(sequelize),
   categoryApp: createCategoryAppModel(sequelize),
   device: createDeviceModel(sequelize),
diff --git a/src/database/migration/migrations/20190415-add-activity-level-blocking.ts b/src/database/migration/migrations/20190415-add-activity-level-blocking.ts
new file mode 100644
index 0000000..f8c3404
--- /dev/null
+++ b/src/database/migration/migrations/20190415-add-activity-level-blocking.ts
@@ -0,0 +1,42 @@
+/*
+ * server component for the TimeLimit App
+ * Copyright (C) 2019 Jonas Lochmann
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import { QueryInterface, Sequelize } from 'sequelize'
+import { attributes as appActivityAttributes } from '../../appactivity'
+import { attributesVersion9 as deviceAttributes } from '../../device'
+
+export async function up (queryInterface: QueryInterface, sequelize: Sequelize) {
+  await sequelize.transaction({
+    type: 'EXCLUSIVE'
+  }, async (transaction) => {
+    await queryInterface.createTable('AppActivities', appActivityAttributes, { transaction })
+    await queryInterface.addColumn('Devices', 'activityLevelBlocking', {
+      ...deviceAttributes.activityLevelBlocking
+    }, {
+      transaction
+    })
+  })
+}
+
+export async function down (queryInterface: QueryInterface, sequelize: Sequelize) {
+  await sequelize.transaction({
+    type: 'EXCLUSIVE'
+  }, async (transaction) => {
+    await queryInterface.dropTable('AppActivities', { transaction })
+    await queryInterface.removeColumn('Devices', 'activityLevelBlocking', { transaction })
+  })
+}
diff --git a/src/function/device/prepare-device-entry.ts b/src/function/device/prepare-device-entry.ts
index c7aaafd..ed91693 100644
--- a/src/function/device/prepare-device-entry.ts
+++ b/src/function/device/prepare-device-entry.ts
@@ -59,5 +59,6 @@ export const prepareDeviceEntry = ({ familyId, userId, deviceAuthToken, deviceId
   currentOverlayPermission: 'not granted',
   highestOverlayPermission: 'not granted',
   asEnabled: false,
-  wasAsEnabled: false
+  wasAsEnabled: false,
+  activityLevelBlocking: false
 })