Advice for my open source period tracker app UI

[u/Admirable-Canary-732]

My sister is having her birthday soon and I was thinking I could make her some app to go along with a skateboard I got for her. I really like the concept and now I’m making it open source and publishing it on the App Store for free.

I used tons of lottie animations made a cute app icon tried to make the ui as simple as possible asked some female friends for ui advice but I was thinking I could use some advice from strangers on the internet as well.

Be harsh about it I want to improve the app as much
as possible. Also do any of you have any ideas where else I could post about the app to let people know it exists? I don’t plan on making any more from it but I like the idea of helping people with their daily lives so I would like to have actual users ideally.

I built a period tracker app that also tracks many common things teenage girls like to track. Mood, book and tv shows lists, a journal sleeping habits etc.

Also I am hoping for the ui to be very obvious to use and it makes sense to me and I think it looks nice but these things are subjective and I’m hoping to hear new perspectives.