If you’re organized enough to have space for Termux on your phone, it does wonders in this department. I feel silly every time I punch Python code into that tee

If you’re organized enough to have space for Termux on your phone, it does wonders in this department. I feel silly every time I punch Python code into that teensy touch keyboard, but damned if I know anything else that has a better input UI and isn’t orders of magnitude less versatile. (Maple Calculator and microMathematics are still on the “there was an attempt” level, in my experience.)