물방울 (Waterdrop) — Privacy Policy

Effective date: July 4, 2026

Waterdrop is a water-drinking reminder app that works without an account. This policy explains what the app does and does not do with your information.

No account, no login

Waterdrop does not ask for your name, email, or any sign-in.

What stays on your device

Your daily goal, drink records, custom cups, and streak are stored only in local on-device storage. Waterdrop has no server of its own, so this data is never transmitted anywhere, and we (the developer) never see it.

Location (optional, for weather-based suggestions)

If you enable "hot day goal recommendations," Waterdrop requests your device location to look up the current temperature via the Open-Meteo weather API. Your coordinates are sent directly to Open-Meteo for that single lookup and are not stored by Waterdrop or shared with anyone else. You can decline this permission and still use the rest of the app.

Notifications

Reminder notifications are scheduled entirely on your device using your chosen interval and active hours. No notification content is sent to or generated by a remote server.

Backup

If you choose to back up your data, Waterdrop creates a file on your device and hands it to your phone's normal share sheet, so you can save it to iCloud Drive, a file manager, or anywhere else you choose. We do not operate our own backup servers.

Advertising

Waterdrop shows a light amount of advertising, served through Google AdMob, to keep the app free. Depending on your permission (App Tracking Transparency on iOS), ads may be personalized using an on-device advertising identifier; if you decline, only non-personalized ads are shown. Google's own privacy policy governs how AdMob processes this identifier: policies.google.com/privacy.

Deleting your data

Settings → Reset lets you permanently erase everything Waterdrop has stored on your device at any time.

Contact

Questions about this policy can be sent via the contact details listed on the app's App Store page.