Hydration, kept honest

Drink water. Prove it.

A tappable “I drank water” button is too easy to lie to. HydroTag puts an NFC sticker on your bottle — the only way to log a sip is to physically tap your phone to the tag.

Download for iPhone See how it works

iPhone · Apple Watch · writes to Apple Health · no account needed

This is your bottle.

Any bottle, mug, or glass you already own.

Stick on a HydroTag.

A tiny NFC sticker. Peel, place, done — it never needs charging.

Tap your phone to log a sip.

One tap on the tag. No app to open, no button to fake.

Watch your day fill up.

Every verified sip raises your level, streak, and badges.

0ml of 2000 ml goal

Why it sticks

Small tag. Honest habit.

Proof, not promises

A drink only counts when you tap the tag. No “mark as done” to fool yourself with.

Gentle reminders

Nudges on your rhythm — every X minutes inside the hours you choose. Snooze once, never forever.

Rising water level

Your home screen fills like a real glass as the day goes on. Satisfying, glanceable, motivating.

Streaks & badges

Keep the chain alive, earn badges, and look back at a clean 7-day chart of your hydration.

Apple Health

Every verified sip writes to Apple Health as dietary water — no double counting, fully on-device.

Apple Watch

See today’s ring on your wrist and ask your phone to scan when your bottle’s nearby.

Honest by design

You can’t cheat the tag.

No accounts. No cloud. No backend. Everything lives on your device. The tap is the proof — that’s the whole point. (Stuck without your bottle? There’s a deliberately discouraged manual override, clearly marked unverified.)

🔒 Local-only — your data never leaves your phone
📶 NFC tags need no battery, no pairing, no Wi-Fi
🚫 No snooze-forever, no fake logs, no dark patterns

Start drinking honestly.

Get HydroTag, stick a tag on your bottle, and let your hydration tell the truth.

Download for iPhone

Works on Iphone, coming soon for Android