ABRSM Music Theory Trainer vs music21
| ABRSM Music Theory Trainer | music21 | |
|---|---|---|
| Free plan | No | No |
| Free trial | No | No |
| Paid from | — | — |
| Open source | No | No |
| Platforms | iOS, Android | Web, Windows, macOS, Linux |
| Free plan | No | Yes |
| Interactive exercises | Yes | — |
| Notation tools | basic | — |
| Harmony tools | Yes | — |
| Rhythm practice | Yes | — |
| Supported platforms | iOS, Android | — |
| Progress tracking | Yes | — |
| MIDI support | — | Yes |
Both are listed in Best Music Theory Software. On Everything Xiaomi, music21 scores higher on our published basis.