Well, here is my ‘thunkable’ based app; a unit calculator that can work both in an algebraic mode (with brackets and equal sign) and with reverse Polish notation (with an ENTER key and a stack).
For the free version: https://play.google.com/store/apps/details?id=com.vgoudreault.PolyunitSMPL
and for the advanced one: https://play.google.com/store/apps/details?id=com.vgoudreault.Polyunit
Now that this is in play.google, I can start looking for a port towards iOS. Is there some sort of primer on how to proceed with iOS? I only have Android devices, and do not own an Apple computer, how does one go about targeting iOS with a completed ‘thunkable’ app that runs on Android?