Fix all bugs from user email
Improve performance
Modify the adaptation problem

1、Improved tuning algorithm, More sensitive and more stable.
2、Fix the algorithm for identifying strings, improve accuracy

Improved recognition of ukulele sounds when playing ukulele tabs

Fix Tutorial crash bugs
Fix ukulele tabs bugs
Modify in - app - purchase information
Fix the chords sound and wrong chords
Fix the chords games bugs
 fix other bugs

*UI upgradation and tabs-games UI improvement : 1. improve users' experience; 2. learn chords and upgrade  UI experience of game mode ;  3.  improve users' experience of record daily
* fix bug
* improve chords games and tab-games performance

* Fix screen adaptation
* Improve chord play sound
*fix ukulele games bug
* Improve picking performance
etc...

Fix  tuner bugs
Fix metronome sound
Fix ukulele chords
Fix song score update
Fix other bugs

Fix tuner bugs
Improve performance: make the tabs more smooth.
Fix chords games bugs
Fix metronome pic bugs on iphone5s
Fix ear training games sound bug.

Add Ukulele tutorial
Add study plane
Update UI
Fix tuner bug.

Fix bugs
Update UI

fix bugs

Add Privacy Policy
Add subscribe.
Fix tabs bug.
update the picking note functions

Add ukulele tabs
Add ukulele song games
Screen matching fix

Fix bugs :Performance - 2.5.4 - background play bugs .

*Add metronome
*Add ukulele chords
*Add chromatic tuner for pipe instruments
*Add tone generator：sound:square wave, piano ,guitar, saw wave ,sax ,english horn
*Add ukulele study games
*Add iphonex version
*Add ipad version
..... More function

Upgrade UI
Fix bug
Improve performance

Fix bug