ABFlow

A-B repeat with playlists.

♪ Exercise 1: I have a pen.
              ━━━━━━━━━━━━━
                     ↑
             LISTEN ONLY HERE!!
                     ↓
              ━━━━━━━━━━━━━━━━
♪ Exercise 2: I have an apple.

Download

https://itunes.apple.com/jp/app/abflow-a-b-repeat-player/id1451678772

Development

$ gem install bundler
$ bundle
$ bundle exec pod install