99math vs Interactive Primer
| 99math | Interactive Primer | |
|---|---|---|
| Free plan | Yes | No |
| Free trial | No | No |
| Paid from | Free | — |
| Open source | No | No |
| Platforms | Android, iOS, Web | Web |
| Free plan | Yes | Yes |
| Adaptive learning | Yes | Yes |
| Gamified practice | Yes | Yes |
| Parent reporting | Yes | — |
| Supported platforms | web, ios, android | web |
| Learner level | elementary | — |
| Guided lessons | — | Yes |
| Offline access | — | Yes |
Both are listed in Best Math Learning Apps. On Freedom251, 99math scores higher on our published basis.