pricing-breakdowns

Period Calendar App Pricing: What You Pay and What It Costs You

Period Calendar by Simple Innovation is free and ad-supported. Your cycle data fuels the advertising that keeps it running.

The Price Tag: Free Period Calendar by Simple Innovation costs nothing to download. It has been one of the most popular period tracking apps on both app stores for years, largely because of that zero dollar price point. For users who search "period tracker" and sort by price, it sits at the top. The app delivers basic period and ovulation tracking, a fertility calendar, symptom logging, and cycle history. It works. The predictions improve over time as you log more cycles. For pure functionality at zero cost, it does what it says. How Free Apps Make Money Period Calendar is ad supported. Advertisements appear throughout the app, and the revenue from those ads funds continued development. This is a standard mobile app business model, but the implications are different when the app handles reproductive health data. Advertising in a period tracker is not like advertising in a weather app. The data being collected alongside those ads includes menstrual cycle dates, fertility windows, symptom logs, and sexual activity records. Ad SDKs embedded in the app collect device identifiers and behavioral signals, building profiles that follow users across the advertising ecosystem. The ads you se