Knowt vs Retain
| Knowt | Retain | |
|---|---|---|
| Free plan | No | Yes |
| Free trial | No | No |
| Paid from | — | Free |
| Open source | No | No |
| Platforms | Web, iOS, Android | Web, iOS, Android |
| Free plan | Yes | Yes |
| Paid from | $12.99/mo | — |
| Adaptive review | — | Yes |
| Source formats | — | mixed |
| Card formats | — | mixed |
| Study modes | — | mixed |
| Mobile apps | — | Yes |
Both are listed in Best Flashcard Apps, Best AI Flashcard Generators. On Samsung Mobile US Press, Knowt scores higher on our published basis.