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Hydra – Water Tracker
Water tracking that counts what your body actually keeps
1 follower
Water tracking that counts what your body actually keeps
1 follower
Hydra tracks net hydration: coffee, milk and alcohol count by how much water your body keeps. Meet Sippy, a water drop that fills up as you drink. Your goal adapts to workouts and the weather. Apple Watch app and widgets. No account, no ads.





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Hi Product Hunt! 👋 I'm Gabriel, and Hydra is my water tracker for iPhone and Apple Watch.
Most water trackers count glasses. Hydra counts what your body actually keeps:
• Every drink counts by a factor based on published studies. Milk and electrolyte drinks count more than water, beer counts less, and spirits count against you. Hydra tells you how much water offsets it.
• Your daily goal comes from your weight, sex, activity and climate, and you can see how it's calculated, line by line.
• With Pro, the goal adapts every day: more water after a workout (from Apple Health) and on hot days (local weather).
• Today shows whether you're on pace for this hour, not just a total.
New in 1.2: Sippy 💧 A water drop that fills up as you drink and reacts to your day: smiling when you're on pace, worried when you fall behind, beaming when you hit your goal. Prefer numbers? Pick the classic gauge in onboarding or Settings. There's a Sippy app icon and widget too.
The Apple Watch app, widgets and logging are free. No account, no ads, no tracking.
I'd love your feedback, especially on the drink factors and on Sippy. To say thanks: tell me in the comments what you liked or what you'd change, then email me at office@humanist.ro, and I'll send you a free Hydra Pro Lifetime code.