If you're looking for an app to help you learn English letter and application writing, the Letter & Application Collection App by Bk Soft Market could be just what you need. This free app is available on Android and is compatible with Android 9.0.

The app provides a collection of letter and application writing samples, making it a valuable resource for anyone studying English. The app also includes easy grammar, making it accessible for users of all levels. Additionally, the app is user-friendly and works offline, meaning you can access the content at any time without an internet connection.

Overall, the Letter & Application Collection App is a useful tool for English language learners looking to improve their letter and application writing skills.