Kaer Math vs Principia
| Kaer Math | Principia | |
|---|---|---|
| Free plan | Yes | Yes |
| Free trial | No | No |
| Paid from | $1.67/mo | $4.17/mo |
| Open source | No | No |
| Platforms | Android, Web | iOS, macOS |
| Free plan | Yes | Yes |
| Paid from | $2.99/mo | $6.99/mo |
| Adaptive learning | Yes | — |
| Guided lessons | Yes | Yes |
| Gamified practice | Yes | — |
| Parent reporting | Yes | — |
| Supported platforms | android, web | ios, macos |
Both are listed in Best Math Learning Apps. On Everything Xiaomi, Kaer Math scores higher on our published basis.