1. Overview
Hydration is a personal hydration habit tracker. Core use does not require an account, and the app does not display ads or use personal information for targeted advertising. With your permission, we use the Umeng SDK to measure app usage, attribute installations from external promotions, diagnose technical problems, and improve the app. If you choose to create an optional account, your synced data is stored by our sync service provider so it can be restored on another device.
Hydration does not provide medical advice, diagnosis, or treatment. Personal goals and statistics shown in the app are not medical opinions.
2. Information We Collect
Without an account, we do not collect your name, email address, phone number, precise location, contacts, or photos. Information you enter includes drink records (beverage, volume, drinking time, and optional note), daily goal, quick sizes, workdays, active hours, quiet hours, reminder slots, and beverage counting rules. This information is used on your device and is not uploaded to our sync server.
If you create an optional account, the app sends your chosen username, a password handled by our sync service provider, and the synced records, plan, reminder state, and completion preference to the sync server so your data can be restored and kept up to date.
When the system asks about notification permission, the app requests permission only for local reminders.
Analytics and Attribution
We use the Umeng SDK to understand app usage, measure installations from external promotions, diagnose performance, prevent abuse, and improve the app. Umeng is initialized only if you select Agree in our privacy agreement and iOS grants tracking authorization through App Tracking Transparency (ATT). If you decline the privacy agreement or do not grant tracking authorization, we do not initialize Umeng.
When Umeng is initialized, it may collect device and operating system information, app version, language and region settings, network information, IP address, device identifiers, app launch and session data, interaction events, performance and diagnostic information, and attribution information. If tracking authorization is granted, this may include Apple's advertising identifier (IDFA).
We do not use this information to deliver targeted advertising or sell personal information. Umeng processes data according to its own privacy policy: https://www.umeng.com/page/policy.
3. How We Use Data
App data is used to calculate daily progress, generate trends and statistics, create local reminders, export records when you choose to do so, and synchronize your optional account data between your own devices.
Analytics and attribution data collected through Umeng is used to measure app usage and installations, understand general feature performance, diagnose technical problems, prevent abuse, and improve the app. We do not use it to deliver targeted advertising, create advertising profiles, or sell personal information.
You can continue using the core app and local hydration features if you decline the privacy agreement or do not grant tracking authorization.
4. Data Storage
Without an account, data you enter in the app is stored only on your device. With an optional account, records, plan, and reminder state are stored by our sync service provider using HTTPS and per-user access controls. The app does not sync through iCloud or any unrelated cloud service.
Analytics and attribution information collected by Umeng is processed by Umeng and its service providers as described in the Umeng privacy policy. It is not stored in your Hydration account or local hydration records.
5. Notifications
Reminders are implemented with iOS local notifications and do not rely on remote push services. Notification content comes from reminders you set in the app and is not sent to the developer.
6. Sharing, Analytics SDKs, and Third Parties
We do not sell, rent, or share your personal data with third parties for marketing or targeted advertising. A third-party cloud service hosts optional account and sync data as our backend provider.
If you consent to the privacy agreement and grant tracking authorization, the Umeng SDK may receive analytics and attribution information as described in Section 2. Umeng is a third-party analytics and attribution provider. We do not use Umeng to display advertisements or sell personal information.
Exported files are handled by the iOS system share sheet, and whether to save or send them is your choice.
7. Data Export and Deletion
You can export JSON or CSV files in Data > Local Data Management. Tapping Clear All Data deletes local records, plan, and pending reminders. This action cannot be undone.
If you created an account, Data > Delete Account deletes the account and all data synced to the server. It does not automatically clear local data on the device, so you can also use Clear All Data if you want to remove the local copy.
8. Children's Privacy
Hydration do not knowingly collect personal information from children.
9. Policy Changes
If we update this privacy policy, we will update the "Last updated" date on this page. Material changes will be announced in the app or through another reasonable notice.
10. Contact Us
If you have questions about this privacy policy or data management, contact us at daothuydat8483@icloud.com.