Privacy Policy

The Short Version

Hydrate does not collect, store, or transmit any personal data. Your water intake stays on your device. Starting with version 1.5, Hydrate sends anonymous diagnostics to help fix problems. You can turn this off in Settings at any time.

Data Storage

Your drinks, goals, streaks and settings are stored on your device, where the Hydrate app and its widgets share them. Your drinks, goals, and streaks are never sent to any server, cloud service, or third party; the only thing Hydrate sends is the anonymous diagnostics described below. There are no user accounts and no sign-up required.

Apple Watch

If you use Hydrate on Apple Watch, your iPhone sends today's goal and drinks to your paired watch, and drinks you log on the watch are sent to your iPhone. This happens directly between your own devices through Apple's WatchConnectivity; nothing goes to us or anyone else.

Apple Health

If you connect Apple Health in Settings, Hydrate saves each drink you log to Apple Health as Water (dietary water), and deletes or updates it there when you delete or change the drink in Hydrate. Hydrate only writes Water; it doesn't read any data from Apple Health. Health data is governed by Apple's privacy policy and never leaves your device through Hydrate.

If you don't connect Apple Health, or turn it off, the app works the same and your drinks stay in Hydrate only. You can pause saving in Hydrate's Settings, or change access any time in the Health app.

Anonymous Diagnostics

Starting with version 1.5, Settings › Privacy has a “Share anonymous diagnostics” switch. It is on by default, and you can turn it off at any time. While it is on, Hydrate sends Idle Fusion's own diagnostics service:

• which screens you open and a few fixed in-app actions (not what they contain),
• crash and hang reports from iOS (MetricKit), and the type and code of errors the app catches,
• the app version, build, and iOS version, and a random session ID that is not tied to you or your device.

It never sends the drinks you log, amounts, goals, streaks, health data from Apple Health, or anything that identifies you. It is not used to track you across apps or websites, and it is not shared with or sold to anyone. Turning it off deletes anything not yet sent. Reports are kept for 30 days and then deleted. The service runs on Cloudflare, which sees your IP address in transit; Idle Fusion uses it only briefly to limit abuse and does not store it.

Analytics & Tracking

Hydrate contains no advertising, no ad SDKs, no tracking pixels, and no third-party analytics frameworks. Apart from the anonymous diagnostics above, which you can turn off, it collects nothing.

Network Usage

Hydrate works entirely offline. It makes network requests only to send anonymous diagnostics, unless you have turned them off, and through the App Store for updates.

Notifications

If you enable hydration reminders, notifications are scheduled locally on your device. No data is sent to any server to deliver notifications.

Children's Privacy

Hydrate does not knowingly collect personal information from anyone, including children under the age of 13. Anonymous diagnostics contain nothing that identifies a person.

Data Deletion

When you delete the Hydrate app, its data is permanently deleted from your device. You can also delete every drink in Settings. Drinks already saved to Apple Health stay there until you delete them in the Health app. There is no cloud copy to remove because we never had your data in the first place.

Changes to This Policy

If this policy changes, we will update this page with the new effective date.