# Periodical privacy rating

Open source Android period calendar that estimates fertile days with the calendar method, with notes, symptoms and local backup.

## Summary

Periodical scores 77 out of 100 (grade B) on the period trackers criteria. It meets 4 of 6 criteria: open source, no ads or data sales, data stays on device and no account needed. It partly meets no trackers or telemetry. It does not meet independent audit.

- Website: https://arnowelzel.de/en/projects/periodical
- Source code: https://codeberg.org/askaaron/periodical
- Platforms: Android
- Home page trackers: none found
- Category: [Period trackers](https://privacyratings.com/period-trackers/)
- Grade: B (77/100)

## Criteria

| Criterion | Answer | Note | Evidence |
| --- | --- | --- | --- |
| Open source | Yes | GPL-3.0. | https://codeberg.org/askaaron/periodical/src/branch/main/COPYING |
| No trackers or telemetry | Partial | The Exodus report finds no trackers and the app has no internet permission, but the project website uses self-hosted Matomo analytics. | https://reports.exodus-privacy.eu.org/en/reports/de.arnowelzel.android.periodical/latest/ |
| No ads or data sales | Yes | Free software with no ads. | https://arnowelzel.de/en/projects/periodical |
| Independent audit | No | No independent audit is published. |  |
| Data stays on device | Yes | Data is stored only on the device, with optional backups to local storage. | https://arnowelzel.de/en/projects/periodical |
| No account needed | Yes | No account needed. | https://arnowelzel.de/en/projects/periodical |

Source: https://privacyratings.com/period-trackers/periodical/
Edit: https://github.com/privacyratings/privacyratings.com/edit/main/ratings/period-trackers/periodical.md