circa. Get the app

For iPhone · Free during the beta

The fasting tracker that counts your fasted steps.

Circa lays your movement over your fasting clock. See every step you take in the fat-burning window, and get more out of both.

Download onTestFlight

$9.99/mo Freeuntil the full App Store release

467 of 500 founding beta spots claimed

Circa home screen: a circular 24-hour clock showing an active 16:8 fast with step bars around the ring

One ring. Your whole metabolic day.

◔

Your day on one dial

A 24-hour clock face holds your fast window, your sleep, and every 15 minutes of movement. No tab-hopping to piece the day together.

⚡︎

Fasted steps, counted

Circa reads your steps from Apple Health and shows which ones landed inside your fast: the ones working hardest for you.

◎

A protocol that fits

From a gentle 12:12 to a strict 20:4. Answer a few questions about meals, schedule, and training, or set the window yourself on the dial.

✎

Honest logging

Forgot to tap? Slide your real start and end times after the fact. The ring and your log rewrite themselves. No fake perfect streaks.

▣

Lives on your lock screen

A Live Activity tracks your fast in real time, and home-screen widgets keep the ring one glance away.

✕

Private by design

Read-only Apple Health access, and your health data stays on your phone. No ads, no selling your data.

Circa stats screen: 63.2k total fasted steps, a 24-day streak, daily bars with the fasted share highlighted, and a 58% average fasted share

Stats

Same steps. Better timing.

Most people don't need to move more. They need to move earlier. Circa tracks your fasted share: the slice of your daily steps that lands inside your fast. Watch it climb as your timing improves, and keep the streak alive.

Circa fasting window screen: 16:8 selected on a coral dial, fasting 8 PM tonight to 12 PM tomorrow

Your window

Pick a window. Or drag your own.

16:8, 18:6, 20:4, or fully custom. You set your fast on a dial, not a form. And when real life gets messy, edit your actual start and end after the fact; Circa recounts your fasted steps to match.

iPhone lock screen with the Circa Live Activity: 16:8 fast, 3 hours 5 minutes elapsed, and an End button
iPhone home screen with the Circa widget: elapsed fast timer, 16:8 label, time remaining, progress bar, and an End Window button

Widgets

Your fast, everywhere you look.

A Live Activity keeps the countdown on your lock screen, and the home screen widget puts your whole window one glance away, End button included. No unlocking, no hunting for the app.

Start your first fast tonight.

Grab one of the last founding spots before the beta fills. iPhone only, for now.

$9.99/mo Freeuntil the full App Store release

Download onTestFlight