Guitarians | 結他Chord譜 is a music & audio app by ZaLab with 50,000+ downloads (about 83K estimated). Released Oct 16, 2016. Install growth, rank history, SDKs and ad networks.
From the store listing: “Guitarians official mobile app ✓ automatic turn Key, turn CAPO ✓Chord table ✓ Favorites function -Bookmark ✓ score list -Playlist ✓ song video”
