- each mode setting
- least stable time
- error allowance rate
- second rate
- debugging mode
- auto playback answer when correct
- IntervalPracticeFilter mode setting
- triad mode setting
- Global Settings
- save settings when closed the app, reload it when open the app
- song practice mode
- Library page
- user can import midi
- store history of played notes
- database of notes
- SUMMARY page
- report top/bottom 10 notes
- a sentence to cheer up user
- Help pages
- note help page
- interval help page
- chord help page
- song help page
- how to create a song and put it in app
- about us page
- user-guide
- user-guide group (on github)
- in app user-guide book
- gestures
- swipe left, swipe right to prev/next question
- ...
- better icon, UI
- icon for app
- colour
- font, text colour
- font size, image size to fit to different devices
- colour scheme, (customize)
- random generate button icon (pineapple, penpinapple, applepen, ppap)