Privacy Policy
Last Updated: January 8, 2025
Data Collection
We collect ZERO data.
GrowthTracker is designed with privacy as a core principle. All information you enter into this application is stored exclusively on your device using platform-level encryption.
What This Means:
- No servers: We do not operate any servers that receive, process, or store your data
- No analytics: We do not track how you use the app
- No third-party services: We do not share data with any third-party services
- No internet connection required: The app works completely offline (after initial growth chart download)
- No accounts: We do not require you to create an account or provide any personal information
Data Storage
All data you enter (child profiles, measurements, notes) is stored locally on your device using:
- iOS: Keychain Services with AES-256 encryption and optional biometric protection
- Android: Android Keystore System with hardware-backed encryption
Your data never leaves your device unless you explicitly choose to back it up through your device's standard backup mechanisms (iCloud, Google Backup).
CDC and WHO Growth Chart Data
The app downloads official CDC and WHO growth chart data from the Centers for Disease Control and Prevention (CDC.gov) and World Health Organization (WHO) to provide accurate percentile calculations. This download:
- Does not include any of your personal data
- Does not send any information about you or your children
- Is cached locally for 30 days to minimize network requests
- Requires internet connection for initial download only
Your Rights
Since we don't collect any data, there is no data for us to access, modify, or delete. You have complete control over your information:
- All data is on your device
- Uninstalling the app will remove all data from your device
- You can manually delete individual children or measurements at any time within the app
Children's Privacy
GrowthTracker is designed to track children's growth information, but we do not knowingly collect any personal information from anyone. All data remains on your device.
Changes to This Policy
We may update this privacy policy from time to time. Any changes will be reflected in the app and on this website with an updated "Last Updated" date.
Contact
If you have questions about this privacy policy, please contact us by opening an issue on our GitHub repository.