Hidro · Water tracking for athletes
Privacy Policy
Hidro – Privacy Policy
Last updated: November 10, 2026
Hidro ("the app") respects your privacy.
Accounts and data
There are no accounts or sign-ups. Your weight, goals, drink log, training history and settings are stored only on your device (and in the app group shared with the app's widgets). We do not collect this data; it is deleted when you delete the app.
Apple Health (HealthKit)
If you allow it, Hidro writes the water you log to Apple Health and reads your workouts and active energy to adjust your daily goal. Health data is processed only on your device; it is never sent to a server, never used for advertising or marketing, and never shared with third parties. You can change this permission anytime in iPhone Settings → Health → Data Access & Devices → Hidro.
Notifications
Water reminders are scheduled on your device; their content does not come from a server.
Ads
The app is free and shows Google AdMob ads. AdMob may collect information such as device identifiers (the advertising identifier / IDFA, if you allow it), approximate location derived from your IP address and ad interaction data to serve and measure ads and prevent abuse. Your health data is never shared with ad partners. You can decline personalised ads in the prompt shown on first launch or in iPhone Settings → Privacy & Security → Tracking.
Purchases
The "Remove Ads" purchase is handled by Apple. Your payment details never reach us.
Health disclaimer
Hidro is not a medical device and does not provide medical advice. Water goals are based on general sports-nutrition guidance.
Children
The app is not directed at children and does not knowingly collect personal data from children.