Health & FitnessHydra: Water Tracker
Hydration made simple.
Log every drink in under two seconds and watch a liquid ring fill toward a goal computed from your body and routine. Smart algorithmic reminders, streaks, levels, achievements, Apple Health sync, and widgets, all 100% on-device with no account.
Everything you need
One-tap logging
Quick-add presets, recents, retroactive logging, and an undo snackbar after every log.
Real drink science
A built-in beverage database with per-drink hydration percentages; the ring counts effective ml and caffeine totals ride along.
Smart reminders
A pure on-device algorithm that adapts to your pace, with log and snooze actions right on the notification.
Streaks, levels & achievements
Daily goal streaks with freeze tokens, a trophy wall, and levels that grow with every goal you complete.
History & insights
Calendar month view plus weekly, monthly, and yearly trends, time-of-day analysis, and drink breakdowns.
Apple Health sync
Write water to Apple Health and read weight and workouts to fine-tune your daily goal.
Widgets & quick actions
Home and lock screen widgets with instant-log taps, plus long-press quick actions for water and coffee.
100% private & offline
No account, no cloud, no tracking. Every drop lives on your device and works in airplane mode.
Your data never leaves your device
Offline-first. No accounts, no login, no backend, no cloud sync, no server database.
No analytics, no crash reporting, no ad SDKs, no tracking, and no data brokers.
The only network surface is RevenueCat, which handles in-app purchases.
No personal data leaves your device except purchase transaction data sent to RevenueCat.
All notifications are local and scheduled on your device. There is no push server.
You own your data. Export and import is a local JSON file, with no cloud backup.
Simple plans, no lock-in
Free
$0
Free forever. No account needed.
- Log drinks from the built-in beverage database
- Personalized daily goal and the full smart reminder engine
- Streaks, levels, achievements, and celebrations
- 7-day history and the default Aqua theme
- JSON backup, CSV export, and restore
Hydra: Water Tracker Pro
Weekly
$2.99/ week
3-day free trial
Monthly
$9.99/ month
3-day free trial
Yearly
Best value
$69.99/ year
3-day free trial
Everything in Free, plus
- Unlimited history
- Apple Health sync
- Home & lock screen widgets with instant logging
- Custom drinks & favorites
- Advanced insights
- Streak freeze
- Six Pro themes & cup styles
Auto-renewing subscriptions renew automatically unless auto-renew is turned off at least 24 hours before the current period ends. Your account is charged for renewal within 24 hours before the period ends. Manage or cancel any time in your Apple or Google account settings. See the terms of use for full billing details.
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