CK-12 FlexBook 2.0 vs OERSI
| CK-12 FlexBook 2.0 | OERSI | |
|---|---|---|
| Free plan | Yes | No |
| Free trial | No | No |
| Paid from | Free | — |
| Open source | No | No |
| Platforms | Android, iOS, Web | api, self-hosted, Web |
| Free plan | Yes | — |
| Open-license filter | — | Yes |
| Remix and adaptation | — | No |
| Authoring tools | — | No |
| Publishing workflow | — | No |
| API access | — | Yes |
| Content review | — | Yes |
Both are listed in Best Open Educational Resource Platforms. On Samsung Mobile US Press, CK-12 FlexBook 2.0 scores higher on our published basis.