legal-hydrozen

Privacy Policy

Last updated : March 2026

1. Introduction

This privacy policy describes how H2O Flow collects, uses and protects your personal data.

2. Data collected

Advertising (Google AdMob)

When you consent to personalized ads, AdMob may collect :

• Advertising ID
• IP address
• Device information (model, OS version)
• App usage data and interactions

Health & Fitness data (Health Connect)

This app requests access to the following Health Connect data types :

• Hydration — read/write to sync water intake
• Weight — read/write to calculate personalized hydration goal
• Exercise sessions — read to adjust goal based on workout intensity
• Steps — read to adjust goal based on daily activity
• Sleep sessions — read to adjust goal based on sleep quality
• Total calories burned — read to improve exercise-based goal adjustment

This data is :

• Read and/or written locally on your device via Health Connect
• Never transmitted to our servers
• Never shared with third parties
• Never used for advertising purposes
• Only used to provide the core features of the app

3. Purpose of data processing

Data	Purpose	Legal basis
AdMob data	Display ads	Consent (GDPR Art. 6.1.a)
Health Connect data	Core app functionality	Consent (GDPR Art. 9.2.a)

4. Health Connect — specific commitments

In compliance with Google Play’s Health Connect policy, we confirm that :

• Health data is only used to provide or improve the app’s health features
• Health data is never used for advertising, analytics, or data brokers
• Health data is never sold
• Health data access is limited to what is strictly necessary (data minimization)
• Data is deleted from the app when you delete your account or uninstall the app

5. Third parties

Google AdMob

Used to display ads in the app.

• Privacy policy : https://policies.google.com/privacy
• Opt-out : https://adssettings.google.com

Firebase Crashlytics

Used to detect and fix crashes, only if you have consented.

• Privacy policy : https://firebase.google.com/support/privacy

Health Connect (Android)

Local Android platform used to read/write health data.

• Privacy policy : https://support.google.com/googleplay/answer/12954039

6. Data retention

• AdMob data : managed by Google per their own retention policy
• Health Connect data : stored locally on your device, never on our servers
• Crash reports : retained for 90 days maximum

7. Your rights (GDPR)

You have the right to :

• Access your personal data
• Correct inaccurate data
• Delete your data
• Withdraw consent at any time from the app settings
• Lodge a complaint with your local data protection authority (e.g. CNIL in France)

To exercise your rights regarding Health Connect data, you can manage or delete it directly from the Health Connect app on your device.

8. Data security

We do not store your health data on any server. All health data remains on your device and is protected by Android’s Health Connect permission system.

9. Children

This app is not intended for children under 13. We do not knowingly collect data from children.

10. Changes to this policy

We may update this policy periodically. The “Last updated” date at the top will reflect any changes. Continued use of the app after changes constitutes acceptance.

11. Contact

For any privacy-related questions : contact@hydrozen.app