Makes any bottle smart

Never forget to drink water

Stick a tiny HydroTag on the bottle you already own. HydroTag reminds you to drink and the only way to log a sip is to physically tap your phone to the tag. No fake taps, no lying to yourself.

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 HydroTag sticker for your water bottle. 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 matters

You don’t forget on purpose.
You’re just busy.

Your body is about 60% water. Even mild dehydration quietly drains your focus, energy, and mood — you’re running on coffee by 3pm and don’t know why. Staying hydrated keeps your brain sharp and your body running. You just have to remember. Now your bottle does.

A phone alarm

You swipe it away mid-meeting and think “in a sec.” A reminder can nag you — it can’t make you drink. And tapping “I drank” is just as easy to fake, so your streak means nothing.

A HydroTag

The nudge only clears when you physically tap your bottle. No fake taps, no snooze-forever. Just honest streaks you actually earned — and a habit that finally sticks.

Why it sticks

A water intake tracker built on one honest habit.

Proof, not promises

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

Drink water reminders

Gentle nudges in the hours you choose. Unlike an alarm you swipe away, this one only clears when you actually drink. 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 water tracking

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

Apple Watch

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

Smarter, not pricier

We make your bottle smart.
Not your wallet lighter.

Other “smart” water bottles charge you $50 to $80 to replace a bottle you already like, then hand you a battery to babysit. HydroTag turns the water bottle already in your hand into a hydration tracker for the price of a coffee.

The $60 “smart” bottle

Buy a whole new bottle to replace the one you love
Recharge it every week, because it is a water bottle with a battery
Pair it, update firmware, hope the puck doesn’t die
One bottle, one person, so the family needs one each
Landfill electronics the day it cracks or leaks

$50–80 per bottle

The HydroTag sticker

Keep the bottle, mug, or glass you already own
Never needs charging, because there is no battery at all
Peel, stick, tap. Nothing to pair or update
Any bottle, any family member, because tags cost pennies
Tap-verified sips, fully local, nothing to throw away

Pick a pack and check out

$5 1 tag Buy Best value $8 3 tags Buy $12 Family 5-pack Buy

Shipping included · one-time · no subscription, ever

Secure checkout with Stripe · Apple Pay, cards & Link

Start tracking your water intake honestly.

Download the HydroTag hydration tracker app, stick HydroTag tag on your water bottle, and let your hydration tell the truth.

Download for iPhone

Requires iPhone with iOS 26. HydroTag is all you add.