Believe in perfection.here is a concept android app for craigslist.I participate the craiglsist challenge.This is the developer friendly design.developer can develop this design in iOS and Android both operating system.I just tried to keep this minimal that user can easily understand what they want and they easily collaborate with this app.A user will be happy and satisfied when they using this app in future.hope for the best.dribbble : https://dribbble.com/shots/4314564-Craiglist-android-app-concept