I have no background or knowledge on this. I would like to make an app for performance engine building that has various pages with various formulas, unit conversions, tool lists, etc. What program do I use to make an app? I've seen Surge, Bevy, and Godot but those seem to be for games.

Edit: ~~Thank you everyone for your helpful responses. Unfortunately I can only see the responses left on my post, not replys to top level responses. I think this is an instance problem and I'm trying to find out because I would love to see everyone's comments.~~ All is working now