The most complete water tracking app for iOS and Android. Suu doesn't just count milliliters — it learns your behavior, calculates your real hydration and lets you compete with friends.
What is Suu? Suu is an AI-powered water tracking and hydration app for iOS and Android. Its behavioral "Adaptive Hydration Brain" learns how you drink and personalizes your daily goal, notifications and a dynamic hydration plan. It integrates with Apple HealthKit, Health Connect, Apple Watch, Widgets, Dynamic Island and Siri, and is available in 4 languages (English, Arabic, Turkish, Russian).
The things that make Suu different from other water tracking apps
While you use the app, the app learns you. Suu builds a behavioral profile (tempo, pace, drink variety, consistency, activity) and adapts 24 decision areas — notification rhythm, coaching depth, even your pet's mood. Personalization starts on day 3; new users always get a safe default.
A single daily hydration score combining completion (50%), regularity (20%), timing (20%) and over-intake (10%), with clear labels: Excellent, Good, Improving or Weak. Track how your hydration quality — not just quantity — evolves.
A dynamic, time-sliced plan that divides your day into 3–5 windows around your sleep and drinking rhythm and assigns a target to each. Drink organically and Suu recalculates the remaining slices for you.
Weekly water-drinking competition with up to 4 friends. Leaderboard, goal-completion percentage and streak rivalry. iOS and Android users meet in the same league. WaterMinder, Hydro Coach and Plant Nanny don't have this.
91 drinks across 12 categories — water, tea, coffee, juice, soda, dairy, energy, sports, alcohol and more — plus Starbucks, Greenwich and Nevada brand menus. Each drink has a real hydration factor (water 1.0, coffee 0.8, alcohol −0.5), so you see your true hydration, not just liters.
Pace-aware Dynamic Island for iPhone 14 Pro and later: not a raw counter, but a signal of whether you're ahead, on time or behind your personal rhythm — with a ring color and "≈X ml left · ~N glasses" guidance.
Instead of generic "Drink water!" pings, Suu learns your pace over 14 days and sends contextual messages like "You're at 32% — 2,400 ml to go." When you hit your goal, the rest of the day's reminders are cancelled.
Full two-way sync with Apple HealthKit on iOS and Health Connect / Google Fit on Android — water, steps, active energy and workouts. Auto-syncs every 15 minutes with permission-based control.
A native watchOS app with a progress ring and wrist logging, Home Screen widgets in 3 sizes, and Siri Shortcuts plus in-app voice commands ("coffee" → 200 ml) in all 4 languages.
Live in-app exercise sessions (walk, run, cycle) with iOS Live Activity, plus manual logging for 12 sport types. After a workout, Suu suggests 300–500 ml of calorie-based extra water to rehydrate.
A cat or dog that grows with your streak, fed and washed with a water-based "drop" economy, plus mini-games and accessories. It never sends notifications — it motivates without nagging.
Daily, weekly, monthly and yearly charts, your Suu Index, an hourly "Water Journey" story video, plus PDF report and CSV export (Premium). WaterMinder and Hydro Coach don't offer PDF export.
Your goal is calculated from weight, activity, age, sex and BMI, minus the share you get from food, with pregnancy / breastfeeding additions — clamped between 1,500 and 4,000 ml. Not "8 glasses for everyone."
English, Arabic (RTL), Turkish and Russian — with native drink names and smart search. Built for VoiceOver and TalkBack, with a Guest Mode that unlocks every feature without signing up.
How Suu compares feature by feature
| Feature | Suu ✓ | WaterMinder | Hydro Coach | Plant Nanny |
|---|---|---|---|---|
| Free core features | ✓ | Limited | ✓ | ✓ |
| Adaptive AI that learns you | ✓ | ✗ | ✗ | ✗ |
| Hydration score (0–100) | ✓ Suu Index | ✗ | ✗ | ✗ |
| League / social competition | ✓ (4 people) | ✗ | ✗ | ✗ |
| iOS + Android cross-league | ✓ | ✗ | ✗ | ✗ |
| Number of drinks | 91 | ~20 | ~30 | ~15 |
| Compound hydration model | ✓ | Limited | Limited | ✗ |
| Apple Health (HealthKit) | ✓ | ✓ | ✗ | ✓ |
| Health Connect / Google Fit | ✓ | ✗ | ✓ | ✗ |
| iOS Dynamic Island (pace-aware) | ✓ | ✗ | ✗ | ✗ |
| Apple Watch app | ✓ | ✓ | ✗ | ✗ |
| Siri & voice commands | ✓ | Limited | ✗ | ✗ |
| Virtual pet companion | ✓ | ✗ | ✗ | ✓ |
| Arabic (RTL) support | ✓ | ✗ | ✗ | ✗ |
| Languages | 4 (EN/AR/TR/RU) | EN + | EN + | EN + |
| PDF / CSV export | ✓ | ✗ | ✗ | ✗ |
Comparison based on publicly available information. Check each app's official page for the latest details.
Suu stands out with its Adaptive Hydration Brain, the Suu Index hydration score, social leagues, 91 drinks and iOS Dynamic Island support. It works on iOS and Android in 4 languages and can be downloaded free at suuapp.com.
A common starting point is weight (kg) × 35 ml, adjusted for activity, age, sex and BMI. Suu calculates a personal goal between 1,500 and 4,000 ml and recalculates it when your profile changes. General guidance, not medical advice.
Yes. Suu uses a compound hydration model where each drink has a real hydration factor (water 1.0, herbal tea 0.9, coffee 0.8, energy 0.5, alcohol −0.5). Caffeine is not penalized; only sugar and alcohol add an extra-water need.
Free on Android and iOS. Set your personalized water goal in 2 minutes.