How often is this matrix updated?

We review privacy policies and public disclosures quarterly. The matrix reflects the most recent privacy policy version available at the time of the last update.

Why aren't all period trackers included?

We selected the 12 most-downloaded period trackers in the US App Store and Google Play Store. If a specific app is missing, contact us and we'll evaluate it for the next update.

lead-magnets

Period Tracker Privacy Comparison Matrix

A side-by-side comparison of 12 period tracking apps across 15 privacy and security criteria, from data storage location to breach history.

How to Read This Matrix Each row is a privacy criterion. Each column is an app. A checkmark means the app meets that criterion in a privacy favorable way. An X means it does not. A tilde (~) means the answer is conditional or partial. The criteria are ordered from most structurally important (data location, account requirements) to most situationally relevant (breach history, jurisdiction). No single criterion determines whether an app is "safe." The combination matters, and it matters differently depending on your situation. If you live in a state with abortion restrictions, data location and subpoena resistance carry more weight. If you're primarily concerned about commercial data exploitation, third party SDKs and ad network presence matter more. The Comparison Matrix Criterion Floriva Drip Euki Clue Flo Glow Ovia Natural Cycles Stardust Premom Period Calendar Spot On Data stored on device only Yes Yes Yes No No No No No No No No No No account required Yes Yes Yes No No No No No No No No Yes Zero third party SDKs Yes Yes ~ No No No No No No No No No No ad network integration Yes Yes Yes Yes No No No Yes No No No Yes Structurally non subpoenable Yes Yes Yes No No No No No No No N