Polyingo vs Shiken
| Polyingo | Shiken | |
|---|---|---|
| Free plan | Yes | Yes |
| Free trial | No | Yes |
| Paid from | $4.99/mo | £99/mo |
| Open source | No | No |
| Platforms | — | Android, api, iOS, Web |
| Free plan | Yes | Yes |
| Paid from | $4.99/mo | — |
| AI summaries | No | — |
| AI flashcards | No | — |
| AI quizzes | No | — |
| Source uploads | No | — |
| Mobile app coverage | ios_android | — |
| Source citations | No | — |
Both are listed in Best AI Study Tools. On Inferse, Shiken scores higher on our published basis.