Open—Shape vs OtoTheory
| Open—Shape | OtoTheory | |
|---|---|---|
| Free plan | No | Yes |
| Free trial | No | Yes |
| Paid from | — | Free |
| Open source | No | No |
| Platforms | Web, iOS | iOS, Web |
| Free plan | Yes | Yes |
| Progression generator | Yes | Yes |
| Voicing explorer | Yes | Yes |
| Supported instruments | guitar | guitar, bass, keyboard |
| Mobile apps | ios | ios |
| Chord audio playback | Yes | Yes |
| Paid from | — | 5.99 /mo |
| Reverse chord lookup | — | Yes |
| Chord chart export | — | Yes |
Both are listed in Best Chord Finder Software. On Specifiction, OtoTheory scores higher on our published basis.