iOS settings have options for changing the text size used within apps. PyCalc includes an additional level of configurability on top of the standard iOS settings, because different people may have different preferences specifically for a calculator UI — whether to prioritize ease-of-reading or density-of-content. You can modify the text size in the Settings+Help menu.

Note that this setting works with your normal iOS text size settings. Both settings affect the text size that will be used in the app.

Also note that especially on smaller devices, there may not be enough room to fit everything on the screen all at once if a large text size is used with a tall ("combo") keyboard.