Ok for a start, can I suggest 1 minor issue with this App... Would you not need permission from all parties involved before recording any conversation?

If any party declines this but can still give a sufficient reason to search you, then the "recorded evidence" that you may have will not vouch for squat!

IMHO, if you hang around dodgey places whilst dressed like a douche, then you will start to draw unwanted attention to yourself.