New: Version 1.6:
- Fix bugs
- Option to remove advertisements

Version 1.5
- Improve repeat option
- Play speed feature
- Start from the last lesson opening
- Fix concurrency modification issue
- Allow bookmark in lesson detail

Version 1.4: Improve app's working speed

Version 1.3: Night mode

Version 1.2: Fix bugs

Release version 1.0:
First 100 lessons in many daily topics:
- Introduction
- Asking direction
- Greeting
- Talking about restaurant
- ...