Published onDecember 12, 2025I've Tried Every Period Tracker App. Here's Why They All Failed Me (Until I Found One That Didn't)App-FeaturePCOSEndometriosisAdenomyosisToolsA brutally honest review of period tracking apps when you have endometriosis or PCOS. Why Flo made me feel crazy, why Clue couldn't handle my irregular cycles, and what I actually needed all along.