Privacy Policy

Compound does not collect, use, sell, or share personal data. There are no accounts, no analytics, no advertising, no trackers, no third-party SDKs, and no servers of ours. Everything the app knows about you lives on your own devices, where we cannot see it.

Your workout history, progression numbers, exercise choices, and settings are stored as files on your iPhone, inside the app's private storage. They leave your device in exactly two ways, both under your control:

• Your own device backups (iCloud or a computer), which are managed and encrypted by Apple under Apple's privacy policy.
• Live syncing to your own paired Apple Watch, described below.

Deleting the app deletes this data. We keep no copy.

During a workout, the iPhone app sends the session state to the Compound app on your paired Apple Watch, and the watch sends your taps back. This uses Apple's device-to-device Watch Connectivity link between your two devices. It does not pass through any server of ours; we have none.

Health access is optional and requested through the standard iOS permission screen. If you grant it, Compound:

• Saves your completed workouts to Apple Health: activity type, start and end time, and (when the watch runs the session) the heart rate and active energy it measures.
• Reads heart rate and active energy during a live workout, solely to show your live metrics on screen.

Health data stays inside Apple Health on your devices. Compound never transmits it anywhere, never uses it for anything besides the workout in front of you, and never shares it with anyone. You can revoke access at any time in Settings → Privacy & Security → Health → Compound, and the app keeps working without it.

Notifications are optional and local: they are scheduled on your device (for example, when a rest timer ends while the app is in the background) and never come from a server. Compound has no push-notification infrastructure and no device token.

Compound's subscription is purchased through Apple's App Store and processed entirely by Apple. We never see your name, address, or payment details. Billing is governed by your Apple account and Apple's privacy policy; subscriptions are managed in your device's App Store settings.

Compound collects no data from anyone, children included.

If a future version of Compound ever changes any of the above, this page will say so plainly, with a new effective date, before that version ships.

Questions? Write to [email protected]. A person reads it.