Add feature to view Jianpu sheet

Fix bugs

Fix bugs

Fix bugs

Fix bugs

Fix bugs

Fix bugs

Fix bugs

- Fix Left button auto drag
- Fix bugs

- Fix Left button auto drag
- Fix bugs

- Fix Left button auto drag
- Fix bugs

- Sticker for Activity page
- Notification page
- Activity with Guzheng Social Network
- Quick tuning (transpose)
- Customize the zoom in/out of the string collision area
- Automatically drag left hand for: free play, auto play
- Lock screen option
- Recorder your song with midi & wav
- Share file recorder
- New musical instruments: Guzheng Master, Guzheng Extreme, Pipa, Angel Harp, Marimba, Dulcimer, Music Box, Sitar, Xylophone, Koto, Vibes, Kalimba, Santur...

- Notification page
- Activity with Guzheng Social Network
- Quick tuning (transpose)
- Customize the zoom in/out of the string collision area
- Automatically drag left hand for: free play, auto play
- Lock screen option
- Recorder your song with midi & wav
- Share file recorder
- New musical instruments: Guzheng Master, Guzheng Extreme, Pipa, Angel Harp, Marimba, Dulcimer, Music Box, Sitar, Xylophone, Koto, Vibes, Kalimba, Santur...

Version 4.6:
- Fix zoom in/zoom out/scroll

- Fix recorder

- Fix tutorial
- Dynamic Effect

- Activity with Guzheng Social Network
- Quick tuning (transpose)
- Customize the zoom in/out of the string collision area
- Automatically drag left hand for: free play, auto play
- Lock screen option
- Recorder your song with midi & wav
- Share file recorder
- New musical instruments: Guzheng Master, Guzheng Extreme, Pipa, Angel Harp, Marimba, Dulcimer, Music Box, Sitar, Xylophone, Koto, Vibes, Kalimba, Santur...

Version 4.1:
- Fix recorder

- Login/logout Activity
- Fix tutorial
- Dynamic Effect

- Activity with Guzheng Social Network
- Quick tuning (transpose)
- Customize the zoom in/out of the string collision area
- Automatically drag left hand for: free play, auto play
- Lock screen option
- Recorder your song with midi & wav
- Share file recorder
- New musical instruments: Guzheng Master, Guzheng Extreme, Pipa, Angel Harp, Marimba, Dulcimer, Music Box, Sitar, Xylophone, Koto, Vibes, Kalimba, Santur...

Version 4.0:
- Login/logout Activity
- Fix tutorial
- Dynamic Effect
- Fix bugs
- Activity with Guzheng Social Network
- Quick tuning (transpose)
- Customize the zoom in/out of the string collision area
- Automatically drag left hand for: free play, auto play
- Lock screen option
- Recorder your song with midi & wav
- Share file recorder
- New musical instruments: Guzheng Master, Guzheng Extreme, Pipa, Angel Harp, Marimba, Dulcimer, Music Box, Sitar, Xylophone, Koto, Vibes, Kalimba, Santur...

Version 3.8:
- Login/logout Activity
- Fix tutorial
- Dynamic Effect
- Fix bugs
- Activity with Guzheng Social Network
- Quick tuning (transpose)
- Customize the zoom in/out of the string collision area
- Automatically drag left hand for: free play, auto play
- Lock screen option
- Recorder your song with midi & wav
- Share file recorder
- New musical instruments: Guzheng Master, Guzheng Extreme, Pipa, Angel Harp, Marimba, Dulcimer, Music Box, Sitar, Xylophone, Koto, Vibes, Kalimba, Santur...

Version 3.4:
- Dynamic Effect
- Fix recorder
- Emoji text for Activity Page

- Fix bugs
- Activity with Guzheng Social Network
- Full tutorial
- Quick tuning (transpose)
- Fix file recorder
- Fix score image
- Customize the zoom in/out of the string collision area
- Automatically drag left hand for: free play, auto play
- Lock screen option
- Recorder your song with midi & wav
- Share file recorder
- New musical instruments: Guzheng Master, Guzheng Extreme, Pipa, Angel Harp, Marimba, Dulcimer, Music Box, Sitar, Xylophone, Koto, Vibes, Kalimba, Santur...

Version 3.3:
- Fix bugs
- Activity with Guzheng Social Network
- Full tutorial
- Quick tuning (transpose)
- Fix file recorder
- Fix score image
- Customize the zoom in/out of the string collision area
- Automatically drag left hand for: free play, auto play
- Lock screen option
- Recorder your song with midi & wav
- Share file recorder
- New musical instruments: Guzheng Master, Guzheng Extreme, Pipa, Angel Harp, Marimba, Dulcimer, Music Box, Sitar, Xylophone, Koto, Vibes, Kalimba, Santur...

Version 3.2:
- Activity with Guzheng Social Network
- Full tutorial
- Quick tuning (transpose)
- Fix file recorder
- Fix score image
- Customize the zoom in/out of the string collision area
- Automatically drag left hand for: free play, auto play
- Lock screen option
- Recorder your song with midi & wav
- Share file recorder
- New musical instruments: Guzheng Master, Guzheng Extreme, Pipa, Angel Harp, Marimba, Dulcimer, Music Box, Sitar, Xylophone, Koto, Vibes, Kalimba, Santur...

- Quick tuning (transpose)
- Fix file recorder
- Tutorial
- Automatically drag left hand for: free play, auto play
- Lock screen option
- Recorder your song with midi & wav
- Share file recorder
- Background option
- New musical instruments: Guzheng Master, Guzheng Extreme, Pipa, Angel Harp, Marimba, Dulcimer, Music Box, Sitar, Xylophone, Koto, Vibes, Kalimba, Santur...
- Tap string mode
- Vibrato string modem
- Tap string/Vibrato level option
- Strum mode : Snap/Touch
- Fix bugs

- Tutorial
- Automatically drag left hand for: free play, auto play
- Lock screen option
- Recorder your song with midi & wav
- Share file recorder
- Background option
- New musical instruments: Guzheng Master, Guzheng Extreme, Pipa, Angel Harp, Marimba, Dulcimer, Music Box, Sitar, Xylophone, Koto, Vibes, Kalimba, Santur...
- Tap string mode
- Vibrato string modem
- Tap string/Vibrato level option
- Strum mode : Snap/Touch
- Fix bugs

- Tutorial
- Automatically drag left hand for: free play, auto play
- Lock screen option
- Recorder your song with midi & wav
- Share file recorder
- Background option
- New musical instruments: Guzheng Master, Guzheng Extreme, Pipa, Angel Harp, Marimba, Dulcimer, Music Box, Sitar, Xylophone, Koto, Vibes, Kalimba, Santur...
- Tap string mode
- Vibrato string modem
- Tap string/Vibrato level option
- Strum mode : Snap/Touch
- Fix bugs

- Recorder with mid & wav
- Share file recorder
- Import Score Image
- Fix recorder
- Edit your recorder: Rename/Delete
- New musical instruments: Guzheng, Pipa, Angel Harp, Marimba, Dulcimer,...
- Simple interface
- Tap string mode
- Vibrato string modem
- Tap string/Vibrato level option
- Recorder your song
- Performance optimization
- Strum mode : Snap/Touch
- Fix bugs

- Import Score Image
- Fix recorder
- Edit your recorder: Rename/Delete
- New musical instruments: Guzheng, Pipa, Angel Harp, Marimba, Dulcimer,...
- Simple interface
- Tap string mode
- Vibrato string modem
- Tap string/Vibrato level option
- Recorder your song
- Performance optimization
- Strum mode : Snap/Touch

- Fix recorder
- Edit your recorder: Rename/Delete
- New musical instruments: Guzheng, Pipa, Angel Harp, Marimba, Dulcimer,...
- Simple interface
- Tap string mode
- Vibrato string modem
- Tap string/Vibrato level option
- Recorder your song
- Performance optimization
- Strum mode : Snap/Touch
- Fix multi-touch and swipe supported.
- Flexible Guzheng View, easy scrolling and zooming with drag / pinch gesture on the Pitch Slider Bar.