Vela vs Period Calendar
Both keep your logs on your phone and work without an account. Period Calendar is funded by ads, and researchers saw device details going to its ad partners.
| Vela | Period Calendar | |
|---|---|---|
| Where your logs live | Your iPhone | Your phone, with optional Google or Apple backup |
| Account | Not required | Not required |
| End-to-end encrypted sync | Yes. We cannot read it. | No end-to-end claim found |
| Regulatory or research findings | None | Mozilla, 2026: 6/10, the only app reviewed that depends on ads. Privacy International, 2025: ad traffic to Google. |
Choose Vela if
- You want an app with no ads
- You want end-to-end encrypted sync across devices and with a partner
- You want a panic button that wipes your data in one tap
Choose Period Calendar if
- You need Android today. Vela for Android is coming soon.
- You want a free app and do not mind ads
Sources: Mozilla Nothing Personal, July 2026 , Privacy International, May 2025 , App Store listing . Checked October 2026.