Okay, I have this app and the "p tracker lite" app. Both have the same logged dates and all. But for some reason, this app says my period is due March 1st and the other app says it's due feb 28th. Any idea why? Or have any of you heard of p tracker lite not being accurate? They have the same exact info, I'm just wondering why the start dates are different. That means they're both telling me different fertile/ovulation days and all. I'm confused on which to follow!