Privacy Policy

Last updated: April 9, 2026

Data Collection

PepStack does not collect, transmit, or store any personal data on external servers. All data — including peptide protocols, dose logs, journal entries, and health metrics — is stored locally on your device using Apple's SwiftData framework.

HealthKit

If you grant permission, PepStack reads weight, body fat, heart rate, HRV, sleep, and step data from Apple Health to display in your journal. PepStack can also write weight entries back to Apple Health. This data is never transmitted off your device.

Analytics

PepStack uses Firebase Analytics to collect anonymous usage events (e.g., which peptides are calculated, feature usage counts). No personally identifiable information is collected. You can opt out via iOS Settings > Privacy > Analytics.

Camera & Photos

If you grant permission, PepStack accesses your camera and photo library for progress photos. Photos are stored locally on your device and are never uploaded.

Reminders

If you grant permission, PepStack creates reminders in your Apple Reminders app to help you track your dosing schedule.

Third Parties

We do not sell, share, or transfer your personal data to any third parties.

Children

PepStack is not intended for use by anyone under 18 years of age.

Contact

Questions about this policy: danny@pepstack.co

Changes

We may update this policy. Changes will be posted at this URL with an updated date.