Privacy Policy

Last Updated: October 27, 2026

Zephyr: Breathing Exercises ("Zephyr", "we", "us") is a breathing app for iPhone and Android. This policy explains what information the app handles, where it is kept, and who else can see it. Zephyr has no accounts and no sign-up.

1. Information Kept on Your Device

• What you enter: the name you give during setup, your goal and experience level, reminder times, custom breathing patterns and saved sound mixes.
• What comes from using the app: session history (technique, length, date), mood check-ins before and after sessions, Breath Test results (breath-hold time, breathing rate and Breath Score), your pace from Find your pace, XP, streaks, achievements, program progress, favourites, and settings such as theme, sound and haptics.

All of this is stored only on your device. We do not run a server that receives it, and we cannot see it.

2. Information That Leaves Your Device

Zephyr uses RevenueCat to handle Zephyr+ purchases. RevenueCat receives:

• a random Support ID that Zephyr creates for your install (shown in Profile → Support ID), along with the device and purchase data its software needs to check what you have bought;
• your purchase and subscription history from the App Store or Google Play;
• your email address, only if you type one into Profile → Support email. It is optional, used only to find your purchase when you ask us for help, and never used for marketing.

Payments are handled by Apple or Google. Neither we nor RevenueCat ever see your card details. See RevenueCat's Privacy Policy.

Nothing else leaves your device. Zephyr has no advertising, no analytics and no tracking.

3. AI Coach in Versions Before 2.0

Zephyr 2.0 and later have no AI Coach and send nothing to Anthropic or to our server.

Versions before 2.0 included an AI Coach. If you still use one of those versions and send the coach a message, your message and your most recent Breath Score, breath-hold time and breaths per minute are forwarded through our server to Anthropic so the coach can reply. Our server does not store them, and nothing is sent unless you open the AI Coach. See Anthropic's Privacy Policy. Updating to the latest version removes the AI Coach.

4. How We Use Information

• To run the app: sessions, progress, streaks, programs, suggestions and reminders
• To unlock and restore Zephyr+ purchases
• To help you with a purchase problem when you contact us

We do not sell your information, share it with advertisers, or use it for advertising.

5. Device Backups

If backup is turned on for your phone (iCloud on iPhone, Google backup on Android), your Zephyr data may be included in that backup. Those backups are run by Apple or Google under their own privacy policies.

6. Permissions

• Notifications: only if you allow them, for reminders, streaks and achievements.
• Vibration: for the haptic guide during sessions.
• Background audio: keeps voice cues and sounds playing with the screen locked.
• Exact alarms and start-up (Android): to deliver reminders on time and again after a restart. Zephyr may also ask to be excluded from battery optimisation so reminders arrive; this is optional.
• Internet: for purchases only.

Zephyr does not use your microphone, camera, location, contacts or photos.

7. Children's Privacy

Zephyr is not directed at children under 13. We do not knowingly collect information from children under 13.

8. Your Choices

• Erase everything on your device: Profile → Reset app. Uninstalling Zephyr also removes it (apart from any device backup you keep).
• Remove your support email: clear Profile → Support email.
• Delete your purchase record at RevenueCat: email us your Support ID and we will delete it. Your purchase history with Apple or Google stays under their control.

9. Changes to This Policy

We may update this policy. When we do, we change the date at the top of this page.

10. Contact Us

Email: aneesrnmba@gmail.com