*New: Version 2.8
- Improve repeat option
- Ability to change play speed
- Start from the last lesson opening
- Fix concurrency modification issue
- Allow bookmark in lesson detail

Version 2.7: Improve app's working speed

Update
- Night mode
- Better font text

Version 2.5: Fix bugs in navigation

Update version 2.4: Present No-Ad version

Update version 2.3:
+ Ability to set default script
+ Ability to change the order of script page