CENTURY vs Duolingo
| CENTURY | Duolingo | |
|---|---|---|
| Free plan | No | Yes |
| Free trial | Yes | Yes |
| Paid from | £12.49/mo | Free |
| Open source | No | No |
| Platforms | Web | Android, iOS, macOS, Web |
| Free plan | No | Yes |
Both are listed in Best Adaptive Learning Software. On Freedom251, Duolingo scores higher on our published basis.