Stop working after a few weeks

This app was useful when it works after purchasing it. Then it froze and never worked again. Tried to contact the developer without success. Do not buy this until it is fixed. It also does not work at 1/3rd octave, and it does not hold the setting from previous sampling. DO NOT PURCHASE!
It sometimes work and freezes again.

LifeofTrees about Octave: An RTA for the iPhone, v1.2