Defective
Predictably, Fitlich was too good to be true. I say that because it sounded amazing: the App Store description was clear and promising, and the only three reviews were all 5 stars.
Except that then the app SIMPLY DIDN'T FUNCTION. I tried both Gmail and Apple login: nothing. Then I gave my cell number and received a verification code four separate times in a row. And each time, after entering the code, the app started "loading", and NEVER STOPPED! Half an hour later, it was obviously defunct. Shame...