Information We Collect
HeySleep collects and processes the following data locally on your device:
- Sleep Data: Sleep duration, sleep stages (Awake, Light, Deep, REM when using Apple Watch), sleep efficiency (time asleep divided by time in bed), and sleep quality scores calculated by the app.
- Health Data: With your permission, we read heart rate, heart rate variability, blood oxygen saturation (SpO2 on Apple Watch Series 6+), wrist temperature deviation (Apple Watch Series 8+), and motion data from Apple HealthKit to analyze your sleep patterns.
- Device Motion: Accelerometer data from your iPhone or Apple Watch to detect sleep and wake times.
- User Profile: Display name, age, typical bedtime and wake time preferences.
- Sleep Preferences: Mattress firmness setting (for algorithm calibration), whether you share your bed with a partner.
- Manual Notes: Any notes you add to your sleep sessions.
- App Settings: Your preferences such as bedtime reminders, alarm settings, and display preferences.
How We Use Your Information
All data processing occurs locally on your device to:
- Track and analyze your sleep patterns
- Calculate sleep quality scores
- Provide personalized insights about your sleep
- Display your sleep history and trends
Data Storage
Your sleep data is stored locally on your device using Apple's secure storage mechanisms. If you use iCloud, your data may sync across your devices through your personal iCloud account, which is governed by Apple's privacy policy.
We do not operate servers that store your personal or health data.
HealthKit Integration
HeySleep integrates with Apple HealthKit with your explicit permission. We:
- Read heart rate and heart rate variability data to analyze sleep stages
- Read blood oxygen saturation (SpO2) data on supported Apple Watch models
- Read wrist temperature deviation data on Apple Watch Series 8 and later
- Read motion and activity data to detect sleep periods
- Read workout data to correlate exercise with sleep quality
- Read menstrual cycle data (Premium feature) to provide cycle-aware sleep insights
- Write sleep analysis data back to HealthKit so it's available to other apps you authorize
HealthKit data is never used for advertising or shared with third parties. This is enforced by Apple's HealthKit guidelines and our commitment to your privacy.
Third-Party Services
HeySleep uses the following third-party services:
- Firebase Crashlytics: Collects anonymous crash reports to help us improve app stability. No personal or health data is included in crash reports.
- Firebase Analytics: Collects anonymous usage statistics (such as which features are used) to help us improve the app. No personal or health data is included.
- RevenueCat: Manages subscriptions and in-app purchases. RevenueCat receives purchase events, anonymous customer identifiers, and subscription status to process transactions and provide customer support. No health or sleep data is shared with RevenueCat.
Data Sharing
We do not sell, rent, or share your personal data or health information with anyone. Period.
Your data may only leave your device in these cases:
- Syncing to your personal iCloud account (if enabled)
- Anonymous crash reports (no personal data)
- Anonymous usage analytics (no personal data)
Your Rights
You have complete control over your data:
- Access: All your data is visible within the app
- Deletion: Delete the app to remove all locally stored data, or contact us to request data deletion
- Permissions: Revoke HealthKit access anytime in iOS Settings
Children's Privacy
HeySleep is not intended for children under 13. We do not knowingly collect data from children under 13 years of age.
Changes to This Policy
We may update this privacy policy from time to time. We will notify you of any changes by posting the new policy on this page and updating the "Last updated" date.
Contact Us
If you have questions about this privacy policy or our privacy practices, please contact us at:
Email: sleepify.kit@gmail.com