AquaTrack: Hydration Tracker

New: your hydration goal now adapts to the weather — more on hot days, normal as it cools. Private and on-device. No accounts, no servers.

AquaTrack is a hydration tracker built on peer-reviewed science, not gamification. It calculates a personal daily fluid target from EFSA 2010 and IOM 2004 references, credits every drink by its Beverage Hydration Index (Maughan et al. AJCN 2016), and keeps all your data on your iPhone — no servers, no accounts.

WHAT MAKES AQUATRACK DIFFERENT

• Dual-ring dashboard — the outer ring shows BHI-credited hydration, the inner ring shows raw volume. A glass of water and a cup of coffee count differently — AquaTrack shows you both numbers, transparently.

• 40+ beverages, pre-calibrated — water, tea, coffee, juices, milk, sports drinks, broths, even wine and beer — each with a published BHI coefficient. Tap a drink, the ring updates with the right credit, not just the volume.

• Personal daily target — derived from your weight, sex, activity level, climate, and sleep window. Adjusts automatically when you log Apple Health exercise minutes.

• Two-way Apple Health sync — reads dietary water, caffeine, body mass, exercise time; writes your logs back to Apple Health alongside data from other sources.

• 8 widgets, Live Activity, Control Center — Dual Ring on the home screen, lock screen, in the Smart Stack. iOS 18 Control Center button for one-tap logging.

• Smart reminders (Premium) — quiet hours, wake/sleep windows, pacing that adapts to your day instead of pinging on a fixed schedule.

• Streak rescue (Premium) — miss yesterday, recover the streak. Up to 4 rescues per month.

• Daily insight — one fact about your last 24 hours: average gap between drinks, distribution by time, beverage variety.

• Multi-period HealthKit history import — pull in your last week, month, 3 months, or all-time hydration history from Apple Health when you install.

• CSV export (Premium) — every logged drink with timestamp, beverage, volume, BHI credit. Your data, your file.

PRIVACY BY DEFAULT All data stored locally on your iPhone. No accounts, no servers, no analytics SDKs, no tracking. HealthKit data is on-device per Apple's policy. We don't even know you exist — and that's the point.

NOT A MEDICAL DEVICE AquaTrack provides general hydration estimates based on population-level research. It is not a substitute for medical advice. Consult a qualified healthcare professional for individual guidance, especially if you have kidney disease, heart failure, diabetes, are pregnant, or are otherwise required to manage your fluid intake under medical supervision.

PREMIUM A monthly, yearly, or one-time Lifetime subscription unlocks smart pacing, weekly trends, daily insights, custom quick-add, CSV export, Live Activity, and 4 monthly streak rescues. Free tier covers core tracking, fixed-interval reminders, basic widgets, and all 40+ beverages.

DEVICES iPhone with iOS 17 or later. iOS 18 unlocks the Control Center button.

OPEN Methodology, sources, and BHI coefficients are listed in-app and on aquatrack.club/#science. If you want to know why your coffee is credited at 0.99 — the citation is there.