Keep Finn swimming.

Finn Water Tracker turns drinking water into caring for a tiny goldfish. Every glass you log fills Finn's tank. Hit your goal and Finn thrives. Fall behind and he gets sleepy, but he's always waiting for the next glass.

Coming soon toiPhone Coming soon toAndroid
750 / 2,000 ml
Finn is doing fine

How it works

No spreadsheets, no guilt trips. Just a fish who's happier when you drink up.

  1. Log a drink

    Tap a sip, a glass or a bottle. It takes a second, and Finn's tank fills as you go.

  2. Watch the tank fill

    The water rises toward your daily goal. Low water looks murky. A full tank sparkles.

  3. Keep your streak

    Hit your goal day after day to build a streak and unlock new tanks and fish.

NappingUnder 15%
Sluggish15–40%
Doing fine40–75%
Happy75–99%
ThrivingGoal reached

Build your tank

Streaks unlock new homes and new friends. Fill the Big Tank with a crew of three.

FinnGoldfish · your first friendFrom day one
Big TankRoom for three fish3-day streak
PipPufferfish · puffs up when you drink7-day streak
ChompReef shark · Big Tank only14-day streak

Made for real days

Simple enough to use every day, with the details that make it stick.

One-tap logging

Sip, glass or bottle buttons, or just tap the tank. Undo a mis-tap in a second.

A goal that fits you

Set your daily target in 250 ml steps and the tank rescales to match.

Gentle by design

Finn never dies. A missed day means a sleepy fish, not a punishment.

Your data stays on your phone

No account needed. Your history is stored on your device.

On the way

Reminders

Friendly nudges spaced through your day, with quiet hours.

On the way

Apple Health and Health Connect

Sync your water intake with the health app you already use.

The Finn family is growing

Water is just the start. More ways for Finn to help you look after yourself are on the way.

First upFinn WaterDrink more water and keep Finn's tank full.
PlannedFinn SleepWind down on time and wake up rested.
PlannedFinn MealsSimple, judgment-free meal logging.