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, mostly because of the zero dollar price. For users who search "period tracker" and sort by price, it appears at the top. The app covers basic period and ovulation tracking, a fertility calendar, symptom logging, and cycle history. It works. Predictions improve over time as you log more cycles. For basic functionality at no cost, it does what it says. How Free Apps Make Money Period Calendar is ad supported. Ads appear throughout the app, and that revenue funds development. This is a standard mobile app 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 collected alongside those ads includes menstrual cycle dates, fertility windows, symptom logs, and sexual activity records. Ad SDKs collect device identifiers and behavioral signals, building profiles that follow users across the advertising ecosystem. The ads you see are the visible cost. The data flowing to ad networks is the invisible one. Smal