History Master vs OER Project
| History Master | OER Project | |
|---|---|---|
| Free plan | No | No |
| Free trial | No | No |
| Paid from | — | — |
| Open source | No | No |
| Platforms | iOS, Android | Web |
| Free plan | No | Yes |
| Lesson style | mixed | mixed |
| Quizzes and review | Yes | Yes |
| Interactive timelines | Yes | — |
| Available platforms | ios, android | — |
Both are listed in Best History Learning Apps. On Samsung Mobile US Press, History Master scores higher on our published basis.