[jhallenworld]

Numworks is interesting, but not really that great. The two things I don't like are: 1. the Android app is a strictly a physical calculator emulator, and does not try to be the best possible calculator for Android. 2. On the real calculator, the user interface is pretty slow- sure, it's responsive, but it's not very efficient.

So for example, it comes in last on this benchmark:

https://github.com/jhallen/calculator/wiki

[nsajko]

Software isn't the worst thing for UI efficiency on NumWorks: the buttons are very low quality. So not only are many key presses necessary (according to your benchmark), but each key press must be relatively carefully performed to avoid the wrong key being actuated, for example.

That said, the NumWorks UI is quite intuitive.