Mobile Calculator with Graphing

I’d like a simple yet polished mobile calculator app written in Python. It must do the everyday basics—addition, subtraction, multiplication and division—and also offer a graph-plotting screen where I can enter a function such as y = 2x + 3 and see the curve render instantly.

Please build it as a true mobile application that runs on both Android and iOS. Kivy, BeeWare or any other Python-friendly framework is fine so long as I can open the project in a standard Python 3 environment, read the code and continue learning from it.

What I expect to receive
• Complete, well-commented source code
• A brief README with setup, build and deployment steps
• Debug or release builds that I can sideload for quick testing (APK for Android; TestFlight, IPA or simulator build for iOS)

Clean, readable code and a straightforward UI are more important than elaborate styling. If you already have ideas for making the graphing interface intuitive—pinch-zoom, pan, light/dark mode—feel free to suggest them.