This is the best app

This should be the built-in iOS calculator. Ive never hit a bug (maybe Im just lucky, so take that with a grain of salt), and I use this as my main calculator.

Its great for paper-napkin stuff. Functions are stupid easy to make, you have a built-in backtrace thats easy to navigate, and you can replace just about anything you can think of with a symbol. But you dont have to. If its not complicated, just scroll up. If it is, copy paste function done.

Buy this app if that sounds cool.

Franklin Delano Garterbelt about Symbolic Calculator, v1.8.5