| Price from | $4.58/mo | $5/mo |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | — |
| macOS | Yes | Yes |
| iOS | Yes | Yes |
| Android | Yes | — |
| Plans published | 4 | 3 |
| Spec score · Music Learning Apps | 9.0 (#4) | 8.0 (#19) |
| Audience | Musopen says its mission is to increase access to music education with free recordings, sheet music, apps, and educational materials. | The maker says Pianu is made for ages five to eight, with younger and older children welcome. |
| Headquarters | San Francisco, California, United States | Spokane, Washington, United States |
| Support | Musopen directs people with questions or bug reports to its contact page. | Support is available by email at [email protected], including for bugs, scan issues, billing questions, and data deletion requests. |
| What it does | Musopen provides free recordings, sheet music, textbooks, apps and educational materials intended to expand access to music education. | Pianu turns photographed sheet music into playable scores and helps children practice it on a piano. |