What you get

Millpond is free to download, with an optional Pro. This is what the app does today.

Log a drink

One tap
Tap one of ten drink tiles and the water rises.
Any amount
Hold a tile and swipe sideways to log a custom amount.
Your own drinks
Add up to 12 custom drinks, each with a hydration factor.
Undo
Undo a log for five seconds after you make it.

Your day

Daily target
It starts from a suggestion based on your weight, then it is yours to set.
Boosts
Add +250, +500 or +750 ml to today, or a workout boost, always within an upper limit.
Pace
A pace line and chart on Home show where today is heading.
Reminders
Reminders arrive at a fixed interval you set.
Units
Use millilitres or fluid ounces.
Settings on the folded outer display: a 2.5 L daily target, with wake and sleep hours drawn as a curve through the day.
Home on the folded outer display with the Pace chart open: teal bars for the drinks so far and a dotted line on to the evening.

Look back

Logbook
Edit or delete any log, with no look-back limit.
Ranges
Insights covers 4 weeks free. With Pro it also covers 3 months, 6 months, 1 year and all time, with longer ranges appearing as your history grows.
Shapes
See a week's shape, a drink mix, and a curve of a typical day with today's line over it once you have 7 logged days.
Monthly recap
With Pro, replay your month and share it as an image.
The Logbook on the outer display: today's water and two coffees with their times and amounts, and earlier days listed below with their totals.
Insights on the outer display: a 2.3 L typical day, 7 of 7 days reached target, 7 days logged this month and 59 L into the pond, above a row of daily water bars topped with lily pads.

Around your phone

Home Screen widget
The small widget logs a cup, 250 ml or 8 fl oz of water, without opening the app. The medium widget has four drink buttons.
Siri and Shortcuts
Ask Siri to log one of the ten built-in drinks, or add it to a Shortcut.
Apple Health
Read, write and workout boost are all off until you turn them on.
iPhone Duo
The layout follows the fold, with a tab bar that becomes a pill on the outer display.
The folded iPhone Duo Home Screen with the small Millpond widget: 1.5 L of 2.5 L, 58% today, with a button that logs a drink in one tap.
The small widget close up: 1.6 L of 2.5 L, 62% today, with a button that logs a drink in one tap.

Calm by design

A ripple
A ripple crosses the water when you log, and Millpond respects Reduce Motion.
Pond stream sound
An optional pond stream sound is off by default.
No pressure
No ads, no streaks to break, no pets that suffer.
Your data
What you drink stays on your iPhone and in your own backups.