i would like to write a crypto related app for iOS and Droid. Any suggestions? There are loads of wallets and price checkers. What would be a killer app?
Depends what you need to build an App for.If I was you,I'd be asking myself following questions,
1.Do I need to make an app as a hobby or to improve my programming skills ?
2.Do I need to make an app to solve a common problem ?
3.Do I need to make an app to make good money out of it since there is a wide scope ?
You know,decompose things !