I just came across this article [0] about the forgetting curve.
I have tried to install Anki[1] for Android but it seems its installs have been blocked on the play store.
I have an android phone, what apps do you use/recommend?
[0]: https://harrisonlo.medium.com/hacking-the-forgetting-curve-1798197b648e
[2]: https://apps.ankiweb.net/