Ninimaths

I wanted an app to improve my mental arithmetic. (I’m taking the GRE soon and was shocked to realize how slow I’d gotten). This is a super well made app that does exactly what I hoped it would do.

Clean interface. Does what it says with simplicity. Not pushy- gives you freedom to work problems at your own pace. Very good brain exercise and will improve your skills. Also- No ads! So please buy the developer a coffee :)

Does what you want. Just enough control, challenge and feedback. Only thing I’d add is a function to determine what your weaknesses are and focus on them within categories. Really minor difference, but for example I’m very slow at multiplying anything by 8s or 9s and could use more specific training.