Pretty, but pretty useless

I bought this app looking for something that does it all without a monthly membership fee. Based on the description, I thought this might be it. However, after messing with it for an hour I will be deleting it. I spent about 45 minutes entering two months of BBT and CM data, but the app never changed my fertile green period from predicted to actual, and sets ovulation 2-3 days after I charted myself as ovulating by BBT, CM, OPK and ferning. Im not sure what method they use to determine ovulation, but its not one that determines *my* cycle correctly. The temperature graph on the main page is too small to be useful, with too wide a temp range to distinguish a pattern, but I couldnt figure out how to "rotate the app" to make the full screen chart appear (yes, I rotated my iPad). The interface is easy to use, aside from it not rotating as it is supposed to, however since I am the type to lock my screen I find apps that require rotation to be frustrating anyway.

Temerity00 about Fertility Clock: menstrual period + ovulation log, v2.2