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Privacy Policy

Last updated: 10 October 2026

Overview

STAmaster is a freediving Static Apnea training app for iPhone. This policy explains what data the app handles, where it is stored, and the choices you have. In short: your training stays on your device unless you choose to back it up to a freediver.space account.

Training Data (on your device)

Breath-hold durations, personal bests, contraction times, heart rate and SpO₂ readings captured during your sessions, session notes, training tables, training plans and your preferences are stored locally on your device.

If you back up your iPhone with iCloud or Finder, your STAmaster data is included in that backup.

Optional freediver.space Account and Backup

Every feature of STAmaster works without an account. If you choose to create or sign in to an account on freediver.space — our own online dive log, run by the makers of STAmaster — the following is sent to freediver.space:

  • Account details: your email address, password, name and handle. The app keeps only a sign-in token, stored in the iOS Keychain.
  • Training sessions you back up: session type and environment, start and end times, table name and notes, and for each hold its duration, target, contraction time, effort and mental-state ratings, heart rate (including the heart-rate samples recorded during the session) and SpO₂ summary values (lowest and post-hold readings).
  • Dive files you upload: .fit files you share with or choose in STAmaster are uploaded to your account.

Automatic backup is on by default once you sign in, and you can switch it off at any time in Profile › freediver.space. Guest sessions are never uploaded. Backed-up data is private to your account: it is not made public, sold, or shared with anyone else. All communication uses encrypted HTTPS.

Apple Health

STAmaster does not read from or write to Apple Health.

Bluetooth Sensors

STAmaster uses Bluetooth only to connect to heart rate monitors and pulse oximeters that you pair (such as Polar, Garmin, Wahoo or the Lepu PC-60FW). It does not scan for or track unrelated devices. Sensor readings are stored with your sessions.

What We Don't Collect

  • No analytics, telemetry, or crash-reporting SDKs
  • No advertising identifiers, tracking, or data brokers
  • No location data
  • No contacts, photos, camera, or microphone access
  • We never sell your data

Third-Party Services

STAmaster contains no third-party SDKs, analytics services, or advertising networks. The only server the app talks to is freediver.space, and only when you sign in, back up, restore, or upload a file. Subscription purchases and status checks go through Apple's App Store (StoreKit), which is part of iOS.

Purchases

STAmaster is free to use. The optional STAmaster Pro subscription is sold and processed by Apple through the App Store. STAmaster never receives your payment details; the app only checks with Apple whether your Apple ID has an active subscription. Buying Pro does not change what data the app collects.

Background Audio

The app uses background audio mode to keep the timer running when your screen locks. It only plays coaching cues and does not record audio.

Your Choices

  • Export your data: Profile › freediver.space › Export my data saves your sessions as a file you can keep or share.
  • Turn off backup: switch off automatic backup and your data stays only on your device.
  • Sign out: removes the sign-in token from this device. Your local training data is not deleted.
  • Delete your account: Profile › freediver.space › Delete account permanently deletes your freediver.space account and all data backed up to it. Sessions on your device are not affected.
  • Delete local data: delete the app from your iPhone to remove all training data stored on it.

Data Retention

Data on your device is kept until you delete it or the app. Data backed up to freediver.space is kept until you delete it or delete your account.

Children

STAmaster is rated 4+ and does not knowingly collect data from children under 13. Breath-hold training is a physical activity; all users should seek medical advice before training.

Safety Disclaimer

Freediving and breath-hold training carries inherent risks. STAmaster enforces a mandatory buddy-check before any wet static (in-water) training session. Never train breath-holding alone in water. This app is a training aid, not a safety device.

Contact

Questions about this policy or your data? Email support@code3.io

Changes to This Policy

We may update this policy from time to time. The "Last updated" date at the top will reflect any changes. Continued use of the app after changes constitutes acceptance of the updated policy.