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