Staggering amout of typographical errors for a QA guy. 😂 
I agree with your sentiment of UI design but forgoing wheels because you don't like how the sidewalls look is a bit myopic. Testing is happening by the way, millions of times over but, there is not a readily accessible log of errors and bug for devs to work on. THAT would be good to implement in wallets BUT the optics of:

STORE YOUR MOST VALUABLE ASSET WITH MY PROGRAM! (but also if there is a, "if you found an error or bug you find log that here," button.) People might not use your program enough to test it.