Kalimba Real

Invalid date

[2.4.1.1] NEW feature: change background
- Optimize search feature
- View tab's youtube in app
Fix bug:
- Fix crash on Android 8.0

[2.4] Add more feature for building tab: Copy feature, Import, Export midi file
- Add Sort feature for World

[2.3.2] Add Search feature for World
Fix bug:
- Fix export .wav file, UI bug

[2.3] Export pdf for tabs from World
- New UI and server protocol for improving efficiency