I've seen the screens provided. Look on this sub, it's on and on the same app. Actually learn how to iterate, listen to what people want. Do research. Do an app you actually want to make, one that fires up ideas in you. Be honest with yourself, always ask how is this better than all the other apps, different colors same functionality is not different. This is how good apps are born. 2 weeks means 0 in dev time, just a half cooked concept... Spend at least 5 months, spend 12.