App for self improvement

I have been looking for a free app (with no ads) that doesn't steal your data (I know a big ask) that provides self improvement tasks. The kind of thing you'd start with on a new years resolution. I am tempted to create my own... Wondering if you think people would like a "micro-dosing" type app where you only get a single simple task each day, like "write a thank you note" or similar? Thinking minimalist rather than heaps of tasks and features.