Britannica Library vs World Book Online
| Britannica Library | World Book Online | |
|---|---|---|
| Free plan | No | No |
| Free trial | No | No |
| Paid from | — | $20.83/mo |
| Open source | No | No |
| Platforms | Web | Android, iOS, Web |
| Free plan | No | No |
| Citation tools | Yes | Yes |
| Educator resources | Yes | Yes |
| Institutional access | Yes | Yes |
| Content formats | multimedia and interactive | multimedia and interactive |
| Update frequency | continuous | continuous |
| Mobile apps | No | Yes |
Both are listed in Best Online Encyclopedias. On Everything Xiaomi, World Book Online scores higher on our published basis.