Best calculator app !!
This app represents the best calculator app for iphone. It even comes close to the usefulness of the TI emulators that are so sadly missing from the app store. Adding sympy import to startup.py is a must. Handling sympy functions is a bit unintuitive, remember to put all expressions that are entered as function arguments into quotes, otherwise it does not work. If the authors would improve usability in this respect - best app ever.