Last updated: 2026-04-25
This Privacy Policy describes how the n=1 iOS app (“the App”) handles your information. The App is published by Gennadii Tsypenko (“we”, “us”). By using the App, you agree to this policy.
With your explicit permission, the App reads health data from Apple HealthKit — for example: sleep, heart rate variability, resting heart rate, weight, VO2 max, workouts, blood glucose, and body temperature. The App reads this data on demand at display time and does not store copies of it. HealthKit data never leaves your device through the App.
You can grant or revoke HealthKit access at any time in iOS Settings → Privacy & Security → Health → n=1.
You may create protocols (interventions you want to test), log daily check-ins (adherence and optional subjective scores for energy, sleep quality, mood), and write notes. This data is stored locally on your device using Apple’s SwiftData. If you have iCloud enabled, it may sync to your other devices via Apple’s CloudKit, which uses your own iCloud account — we have no access to it.
If you opt in, the App schedules daily local reminders to check in. These are scheduled and delivered entirely on your device by iOS. We do not send push notifications from a server.
None. The App does not have a backend service that we control. We do not receive analytics, crash reports, device identifiers, location, contacts, or any other personal data.
The App does not include third-party analytics, advertising, or tracking SDKs.
When AI-generated insights are added in a future version, they will be generated server-side via the Anthropic Claude API through a proxy we operate. At that time, only anonymized aggregate data (e.g., “weekly average HRV before and after the protocol”) will be sent — never raw HealthKit data and never anything that identifies you. We will update this policy before that feature ships.
The App is designed for adults and is not directed to children under 13. We do not knowingly collect data from children.
Because we do not store your data, there is nothing for us to delete on your behalf. To remove your data from the App: open the App → Settings → Data Management → Delete All Data. To revoke HealthKit access: iOS Settings → Privacy & Security → Health → n=1.
If you live in a jurisdiction with applicable privacy law (e.g., GDPR in the EEA, CCPA in California), the same applies — we do not control or process your personal data, so most rights (access, deletion, portability) are exercised directly through your device and iCloud account.
We may update this policy. Material changes will be reflected in the “Last updated” date at the top, and significant changes will be announced via an in-app notice on the next App Store update.
Questions: gennadii8+n1@gmail.com