Need a thorough test of my TWO apps

I have an android app and an ios app. I need an expert in security to test both of these apps, and sort thru the code and look for exploits, and potential holes or back doors, code structure that would cause poor performance, and any other flaws. Pay is $100 per app. I need a detailed report of your findings in order to be paid.

Bonus if you can fix any issues. Not required, but optional.