# Period trackers privacy ratings

Menstrual cycle and fertility tracking apps. Cycle data is sensitive health data.

| Name | Grade | Jurisdiction | Description |
| --- | --- | --- | --- |
| [drip.](https://privacyratings.com/period-trackers/drip/) | B (87/100) | Germany (Fourteen Eyes) | Open source menstrual cycle tracker for Android and iOS that supports the symptothermal method and keeps all data on the device. |
| [Mensinator](https://privacyratings.com/period-trackers/mensinator/) | B (87/100) | Unknown | Open source Android period tracker with custom colour-coded symptoms, cycle and ovulation predictions, and data export, with no sign-up and no network access. |
| [Periodical](https://privacyratings.com/period-trackers/periodical/) | B (77/100) | Unknown | Open source Android period calendar that estimates fertile days with the calendar method, with notes, symptoms and local backup. |
| [Euki](https://privacyratings.com/period-trackers/euki/) | C (67/100) | United States (Five Eyes) | Open source sexual and reproductive health app from a US nonprofit, with period tracking, reminders and health information. Data stays on the device, with an optional PIN. |
| [Apple Health Cycle Tracking](https://privacyratings.com/period-trackers/apple-health-cycle-tracking/) | D (47/100) | United States (Five Eyes) | Cycle Tracking feature in Apple's Health app on iPhone and Apple Watch for logging periods, symptoms and pregnancy, with period and fertile window predictions. |
| [Flo](https://privacyratings.com/period-trackers/flo/) | F (20/100) | United Kingdom (Five Eyes) | Period, ovulation and pregnancy tracking app with cycle predictions, symptom logging and health content, funded by Flo Premium subscriptions. An Anonymous Mode removes name and email from the account. |
| [Clue](https://privacyratings.com/period-trackers/clue/) | F (7/100) | Germany (Fourteen Eyes) | Period and cycle tracking app from Berlin-based BioWink, with predictions, symptom logging and health content, and a paid Clue Plus subscription. |
| [Stardust](https://privacyratings.com/period-trackers/stardust/) | F (7/100) | United States (Five Eyes) | Period tracking app with cycle predictions, symptom logging and moon-phase features, funded by subscriptions. Health data is stored against a random account ID, separate from contact details. |

## Criteria

- **Open source** (weight 3): Is all the source code needed to run the product public?
- **No trackers or telemetry** (weight 3): Are the website and apps free of third-party trackers, with any analytics anonymous and any telemetry off by default?
- **No ads or data sales** (weight 2): Is the product funded without advertising, ad targeting or selling user data?
- **Independent audit** (weight 2): Has an independent security or privacy audit been published within the last three years?
- **Data stays on device** (weight 3): Is cycle data stored only on the device by default?
- **No account needed** (weight 2): Can the app be used without an account?

Source: https://privacyratings.com/period-trackers/