Your cycle. Your device. Nobody else’s business.
After the Dobbs decision, law enforcement agencies began subpoenaing period tracker data. Cara was built so there’s nothing to subpoena — because there’s no server, no account, and nowhere for your data to go but your phone.
Menstrual tracking apps promised privacy. Then Dobbs happened.
The apps millions of women trusted stored everything in the cloud. And cloud storage means subpoenas. It means breach risks. It means a database of your most intimate health data sitting on someone else’s server, waiting.
Women across America started deleting their period trackers. Not because they didn’t need them. Because they couldn’t trust them.
There is no server.
Why Cara Exists
Cara is a menstrual cycle tracking app that runs entirely on your iPhone. Your cycle data, your symptoms, your predictions — computed on your device, stored on your device, never transmitted anywhere.
Not to our servers. Not to Apple’s cloud. Not anywhere. There is no account. There is nothing to subpoena. And unlike cloud-based apps, there’s nothing to breach — because there’s no database of your intimate health data waiting to become the next headline.
You can’t hack data that doesn’t exist outside your phone.
We built Cara because the architecture of privacy-as-promise has failed women. Cara is privacy by architecture — not policy, not promise, not terms of service. There is simply no mechanism by which your data can leave your device.
The Technical Version (For People Who Want It)
- •On-device computation. Cycle predictions run entirely within the app’s sandboxed environment.
- •Local storage only. Data is stored exclusively in encrypted containers on your device.
- •No internet required. Every feature works fully offline.
- •No account. No registration. No identity tied to your health data.
The architecture is the privacy policy. We do not need a long one because there is nothing to govern. There is no server. There is nothing to send.
What Cara Tracks
Everything a period tracker should — and nothing leaves your device:
Cycle dates. Symptoms. Flow. Mood. Predictions.
Cara uses established medical models for cycle forecasting. She learns your patterns. She reports to nobody.
Built for you, runs on your device
Platform
iOS & Android
Price
Free — Always
Data Collection
Absolutely None
Cloud Required
No
Account Required
No
Processing
100% On-Device