I like Numerical^2 for iOS because it remembers your last N calculations so you can go back and get something, and see what it entailed (it shows the entire cal

I like Numerical^2 for iOS because it remembers your last N calculations so you can go back and get something, and see what it entailed (it shows the entire calculation). Not having this ability made me delete Euclid. Numerical^2 also has a nice landscape mode that shows all the operations; it slides the keyboard like Euclid does to show them in portrait mode. Odd, by the way, that the iOS version is more expensive than the macOS version...