LunaCycle vs Flo: Privacy-First Period Tracker Comparison
LunaCycle is the private period tracker alternative for people who want a period tracker that doesn't sell their data — anonymous, encrypted, and account-optional.
Last updated July 2026
Why people look for a private period tracker alternative
Many popular period tracker apps are widely used, but their history with data sharing has led many users to seek a period tracker alternative that prioritizes privacy. If you are searching for a private period app or a period tracker no data sharing option, LunaCycle was designed specifically around that gap.
The documented record: In January 2021, the FTC alleged that Flo Health promised to keep users' health data private but in fact shared sensitive health data from millions of Flo Period & Ovulation Tracker users with marketing and analytics firms, including Facebook and Google. Flo settled with the FTC in June 2021, agreeing to obtain affirmative consent before sharing health data and to have third parties destroy data already received, without admitting wrongdoing. A related class-action settlement is currently paying out $59.5 million (Google $48M, Flo $8M, Flurry $3.5M) to affected users who tracked their cycles in the app between November 2016 and February 2019 — the claim deadline is October 15, 2026.
Source: FTC press releases (Jan. & June 2021), Frasco v. Flo Health, Inc., N.D. Cal. No. 3:21-cv-00757. Settlement resolves allegations; companies did not admit wrongdoing.
LunaCycle vs other period trackers: privacy at a glance
| Feature | Other Period Trackers | LunaCycle |
|---|---|---|
| Anonymous Mode (no account) | Limited | Yes |
| On-device encryption | No | AES-GCM |
| Sells health data to third parties | Historically yes | Never |
| Cloud storage of cycle data | Default | Optional / local |
| Ovulation tracker & fertile window | Yes | Yes |
| Pregnancy & perimenopause modes | Yes | Yes |
| Wearable cycle sync | Yes | Yes |
| GDPR data export & delete | Yes | Yes |
Period tracker alternative with anonymous mode
LunaCycle's Anonymous Mode lets you track your period, ovulation, and symptoms with no account at all — the anonymous period tracker mode many users want. Your entries stay encrypted on your device instead of syncing to a cloud profile. Read more in our anonymous period tracking guide.
Feature parity, privacy by default
Choosing privacy does not mean giving up the tools you rely on. LunaCycle matches popular period apps on cycle predictions, ovulation tracking, pregnancy and perimenopause modes, and wearable cycle sync — while never selling your data. For another angle, see our LunaCycle vs other fertility apps comparison.
Start tracking privately — free
Anonymous Mode, encrypted on your device, no data selling. The private period tracker and Flo alternative.