SpongeUp and running in two minutes
No tools, no complicated pairing. Watch how Sponge goes from the box to tracking every sip, then explore each step yourself.
Charge it over USB-C
Plug in your Sponge for a couple of hours. One full charge lasts about 8 days.
Watch: setting up the app, your profile, and your Sponge ID.
Hydration tracker questions, answered
Everything you want to know before and after you order.
A hydration tracker measures how much water you drink during the day. Sponge is a small clip-on hydration tracking device that snaps magnetically onto any water bottle. On-device sensors record each sip automatically and sync to the free Sponge app, so you never have to log water by hand.
Yes. Sponge is built to clip onto the bottle you already own, insulated steel bottles, plastic tumblers, glass bottles and more. There is no special bottle to buy and nothing to refill differently.
Sponge lasts about 8 days on a single charge and recharges over USB-C in a couple of hours. Most people charge it once a week.
Yes. In the app you pick which apps to gate, and Sponge keeps them locked until you reach your daily hydration goal, turning your phone into a gentle nudge to drink more water.
Yes. On iPhone, Sponge writes your water intake straight into Apple Health, so it sits with the rest of your health data rather than being stranded in one more app. There is also a home-screen widget that shows how much you have had and how far you have to go, so on most days you never need to open the app.
Sponge measures real sips with on-device sensors rather than asking you to remember and self-report, which is where most hydration tracking breaks down. The app shows your intake in real time so you always know where you stand.
Charge it over USB-C, download the free Sponge app, and pair over Bluetooth. Then clip it onto your bottle. Setup takes about two minutes and the app walks you through calibrating your bottle size.
Sponge is $59.99 plus shipping and tax, and the companion app is free on iOS and Android. We build in production batches, and a batch runs once enough pre-orders are reserved to fill it — so rather than quote a delivery date we cannot stand behind, we email you when your batch enters production. You can cancel a pre-order for a full refund any time before it ships, and once it arrives you have 30 days to send it back.
Every Sponge comes with a 30-day money-back guarantee. If it is not for you, contact support within 30 days of delivery for a full refund.
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