Only the current version so far — new entries appear as the app ships updates.
Fifty is an education app by Fifty.do with 1,000+ downloads (about 3.3K estimated). +1 installs in the last 7 days. Released Jan 10, 2020. Install growth, rank history, SDKs and ad networks.
From the store listing: “Fifty recommends personalized actions to be carried out in real life.”