Last updated: April 2026

Overview SleeperPower is committed to protecting your privacy. This policy explains what data we collect, how we use it, and your rights regarding that data. SleeperPower is built by a physician with clinical privacy standards in mind.

Data We Collect

Sleep Data SleeperPower reads sleep data from Apple HealthKit including sleep duration, bedtime, and wake time. When you use the built-in sleep tracker, the app also collects accelerometer, gyroscope, and microphone data overnight to detect sleep and wake periods. Microphone data is processed entirely on your device and is never transmitted or stored. Processed sleep session data (duration, timing, quality metrics) is stored securely in our database to power your Power Score, insights, and history.

Research Data (Optional) If you opt into research participation during onboarding, anonymized sleep epoch data from the built-in tracker is stored securely for validation research purposes. This data contains no personally identifiable information. You may withdraw research consent at any time in Settings. Research data may be used in aggregate, anonymized form in future academic publications.

Account Information If you create an account, we collect your email address stored securely via Firebase Authentication. Google Sign-In users authenticate through Google's OAuth system.

App Preferences Bedtime and wake time targets, notification preferences, and sleep schedule settings are stored locally on your device and in your account for cross-device sync.

Subscription Information Subscription and purchase status is managed by RevenueCat. We do not store payment card information. RevenueCat's privacy policy applies to purchase data.

Usage Data Basic app usage and crash data is collected via Firebase Analytics and Crashlytics to improve app stability. Health data is explicitly excluded from analytics collection.

How We Use Your Data

• To calculate your daily Power Score and sleep metrics

• To display your sleep trends, consistency scores, and insights

• To generate personalized AI coaching responses via Sleep Chat

• To send bedtime reminders and morning report notifications

• To maintain your account and sync preferences across devices

• To conduct anonymized sleep research with your explicit consent

AI Sleep Coaching The Sleep Chat feature uses Claude, an AI service provided by Anthropic. When you use Sleep Chat, a summary of your recent sleep data is sent to Anthropic's API to generate personalized coaching responses. This data is used solely to generate your response and is governed by Anthropic's privacy policy at anthropic.com/privacy. You can use SleeperPower without using Sleep Chat if you prefer not to share data with this service.

Third-Party Services SleeperPower uses the following third-party services:

• Apple HealthKit — to read and write sleep data. Governed by Apple's privacy policy at apple.com/privacy

• Firebase (Google) — for account authentication, secure data storage, and crash reporting. Governed by Google's privacy policy at firebase.google.com/support/privacy

• RevenueCat — for subscription and purchase management. Governed by RevenueCat's privacy policy at revenuecat.com/privacy

• Superwall — for subscription offer presentation. Governed by Superwall's privacy policy at superwall.com/privacy

• Anthropic — for AI sleep coaching responses via Sleep Chat. Governed by Anthropic's privacy policy at anthropic.com/privacy

What We Never Do

• We never sell your data to third parties

• We never use your health data for advertising

• We never share your personal sleep data with third parties except as described in this policy (AI coaching and research with consent)

• We never use your data to track you across other apps or websites

• We never store raw microphone audio from overnight tracking

Data Storage and Security Sleep session data, your Power Score history, and account preferences are stored securely in Google Firebase Firestore with encryption at rest and in transit. Raw microphone data from the overnight tracker is processed entirely on your device and never transmitted or stored on our servers.

Data Retention Your account data is retained until you delete your account. Research data is retained for up to 5 years for academic validation purposes in anonymized form. Upon account deletion, all personally identifiable data is deleted within 7 days.

Your Rights You may at any time:

• Revoke HealthKit access via Settings → Privacy & Security → Health → SleeperPower

• Withdraw research consent via SleeperPower → Settings → Research Participation

• Request deletion of your account and all associated data by emailing sleeperpowerapp@gmail.com with subject "Delete My Account" — completed within 7 days

• Request a copy of all data we hold about you by emailing sleeperpowerapp@gmail.com

• For EU residents: exercise your rights under GDPR including right to access, rectification, erasure, and data portability

• For California residents: exercise your rights under CCPA including right to know, delete, and opt-out of sale (we do not sell data)

Children SleeperPower is not intended for users under 13 years of age. We do not knowingly collect data from children under 13.

Changes to This Policy We may update this policy as the app evolves. Significant changes will be communicated via in-app notification. Continued use of the app after changes constitutes acceptance of the updated policy.

Contact For privacy questions or data deletion requests contact us at: sleeperpowerapp@gmail.com