Hydra
Smart hydration tracking for athletes. Log water, offset sweat, track caffeine — and watch your Hydration Score climb.
Hydration, handled.
More than a water logger — Hydra accounts for sweat, caffeine, and electrolytes to give you one number that actually means something.
Water in, sweat out, caffeine debt subtracted. One animated ring shows exactly where you stand — capped at 150%.
Configurable nudges throughout the day. A smart 2pm alert if you're behind, plus automatic prompts after workouts.
Log runs, rides, gym sessions, and swims. Sweat offset is calculated from duration and intensity — your daily goal adjusts automatically.
Coffee and tea count against you. Caffeine debt is auto-deducted from your effective hydration — so you know the real number.
Auto-import workouts with heart-rate intensity mapping. Water intake writes back to Health — everything stays in sync.
Monthly calendar colour-coded by score. Weekly bar charts, day breakdowns, and symptom tracking to spot patterns over time.
Offline-first — every entry saves locally, then syncs in the background. Switch devices and pick up exactly where you left off.
Track sodium, potassium, and magnesium. Five drink presets for quick logging — plus a warning if your levels dip after a workout.
See it in action.
Real screenshots from Hydra — the dashboard, insights, workout logging, and more.
Free to start. Pro when you're ready.
Everything you need to stay hydrated is free. Go Pro for the full athlete toolkit — caffeine tracking, health integrations, cloud sync, and more.
Start logging water and workouts for free. Upgrade when you want the deeper insights.
- Water intake logging
- Manual workout entry
- Basic hydration score
- 3 daily reminders
- 7-day history
- Caffeine & electrolyte tracking
- Apple Health auto-import
- Cloud sync & multi-device
- Unlimited reminders
- 90-day history
- Custom accent colours
Hydra plugs directly into Apple Health — your workouts flow in, your water flows back. No manual entry required.
Auto-import workouts — running, cycling, swimming, gym, and more.
Heart rate maps to intensity — low, moderate, or high — for accurate sweat estimates.
Water intake writes back to Health, so your hydration data lives in one place.