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For iPhone · Apple Watch · iPad

The hydration tracker you never open.

A free water reminder app for iPhone, Apple Watch, and iPad.

Free. No ads. Powered by Apple Intelligence.

Download on theApp Store
Available on iPhone, Apple Watch, iPad
The promise

The app you do open. Rarely.

When you do open Waterd, it's calm. Cute droplet. Four taps to log. Volume math that's honest. Then back to your day.

How logging works ↓
Waterd Today screen — log fluid intake with a few taps and watch the daily progress fill
Made for iOS 26
Foundation Models
HealthKit
Apple Watch
100% On-Device

Built for GLP-1 patients →

Layer 2 · Interactive

Every iOS surface. Zero app opens.

Home Screen Widget

Tap a vessel — logged.

Dynamic Island

Live progress, always there.

Lock Screen Widget

Your day at a glance.

Apple Watch

Tap on your wrist.

Control Center

From any screen.

Plus Live Activities, Siri Shortcuts, and notification action buttons. The app gets out of your way.

The offer

Free forever. No ads.

Everything you need for hydration is yours, free.

Free — yours, forever

All hydration, no ads.

  • Water tracking
  • 4 default vessels (Water, Glass, Coffee, Sip)
  • Home Screen widget
  • Lock Screen widget
  • Dynamic Island + Live Activities
  • Apple Watch app + Smart Stack
  • Control Center toggle
  • Two-way HealthKit sync
  • Reminders (auto-silence on goal)
  • Streak counter
  • Water quality grade for your ZIP

Premium — adds Apple Intelligence

$1.99/mo · $4.99/yr · $7.99 lifetime

  • Everything in Free
  • Daily Hydration Intelligence
  • Weekly AI Insight
  • Natural Language logging
  • Bottle Photo Scan
  • Adaptive Notifications
On-device intelligence

Reasoning, on your iPhone. Zero cloud.

Apple Intelligence

Daily Intelligence

"4 bottles today — adjusted for your run and warm weather." A goal that updates with your day.

Apple Intelligence

Weekly Insight

"Saturday's the gap." Patterns surface so you can act on them.

Apple Intelligence

Natural Language

"Had 2 glasses and a coffee" → 3 logs, automatically parsed.

Apple Intelligence

Bottle Photo Scan

Snap your bottle, we read the label and log the size.

Apple Intelligence

Adaptive Notifications

Reminders that learn your rhythm — calmer on quiet days, prompt on missed ones.

Built on Apple's Foundation Models framework. Your data never leaves your iPhone.

Honest math

Real ounces. Not just tap counts.

Mix a 24oz bottle and a 10oz glass — the math stays honest. Switch to bottles or drinks display anytime if you prefer.

What other apps show

2 of 4 bottles

Looks fine. Doesn't tell you a thing.

What Waterd shows

47 of 96 oz · 49%

Honest, mixable, real volume math.

Know your water

Your tap water grade — right in the app.

Pull your local water quality report by ZIP. Powered by TapWaterData.com's database of 50,000+ U.S. water systems.

How we score water quality →

San Francisco, CA

SFPUC City Distribution Division

A

Excellent. 96 / 100.

185 contaminants tested · 2 above limits

Built for Apple

Your data, your device, your decision.

Two-way HealthKit sync

Logs flow into Apple Health. Workouts and weight flow back to inform your goal.

Stays on your iPhone

All AI runs on-device. No accounts, no email, no cloud sync.

We can't see your data because we don't collect it.

Want the AI?

Free, with optional Apple Intelligence.

Monthly

$1.99/ month

Cancel anytime

7-day free trial
  • Daily Hydration Intelligence
  • Weekly AI Insight
  • Natural Language logging
  • Bottle Photo Scan
  • Adaptive Notifications
Yearly

$4.99/ year

save ~80% vs monthly

  • Daily Hydration Intelligence
  • Weekly AI Insight
  • Natural Language logging
  • Bottle Photo Scan
  • Adaptive Notifications
Best value
Lifetime

$7.99once

Pay once, keep forever

  • Daily Hydration Intelligence
  • Weekly AI Insight
  • Natural Language logging
  • Bottle Photo Scan
  • Adaptive Notifications
Download on theApp Store

All three unlock the same five Apple Intelligence features. Family Sharing supported.

Questions

The honest answers.

Is it really free?

Yes. Tracking, all five iOS surfaces, water quality, HealthKit, reminders, streaks — all free, no ads, ever. Premium ($1.99/mo · $4.99/yr · $7.99 lifetime) only adds five Apple Intelligence features.

What does Premium add?

Daily Intelligence (smart goal adjusted for weather, activity, history), Weekly Insight, Natural Language logging, Bottle Photo Scan, and Adaptive Notifications. All run on-device using Apple's Foundation Models — no cloud, no monthly compute cost passed to you.

Does it work without internet?

Yes. The whole app and all AI features run on-device. Water quality lookup needs internet for the initial fetch, then it's cached.

Is my data shared?

No. There are no accounts. We never see your data. HealthKit data stays in HealthKit. AI runs on your iPhone.

Why iPhone-only?

Apple Intelligence and Foundation Models are iOS 26-only APIs. We chose to build the best on-device hydration app rather than the most-portable one.

How is this different from WaterLlama or Water Reminder?

No ads, ever. Apple Intelligence on-device. Volume-honest math. And a $7.99 lifetime option — pay once, keep forever.

On a GLP-1 medication?

GLP-1 medications suppress thirst alongside appetite. We built a dedicated explainer for hydrating well on Ozempic, Wegovy, Mounjaro, and others. Read the GLP-1 hydration guide →

Get Waterd

The widget logs. The app reflects.

Free, no ads. iPhone, Apple Watch, iPad.