This app was mentioned in 2 comments, with an average of 1.50 upvotes
Great work! Do you have a todo list somewhere? Maybe I can help.
Also, have you considered working together with others or other apps? I think it would be very beneficial for everyone to at least have a shared library for the communications/protocol.
There are also already apps for the notification functionality (miband-notifier or gadgetbridge for example) and also some for the fitness/steps functionality (OpenBand/OpenBand GitHub or gliderun). So maybe making an app that only does steps or only does notifications which can be used together with another app that does the other thing is an option as well.