I'm building a gamified habit tracker, similar to Habitica[1], but simplified in some ways, and with offline support. My biggest issues with Habitica are their lack of offline support (even on mobile), and their extremely downtime-prone servers. My goal is to make something more pleasant to use.
I don't have a link to share since it's still fairly early in development, but I'm making good progress!
If you do graphics like Habitica, I think another improvement over them would be to do the graphics better. Not sure if others share this opinion but Habitica's art style I really find awful, generic and boring. Less so the pixel art (I like pixel art), but the colour palettes and sprites just don't feel great for me.
I don't have a link to share since it's still fairly early in development, but I'm making good progress!
[1] https://habitica.com/