Intermittent fasting tracker · free on iPhone

Fasting, made simple

Start a fast in one tap, see what your body is doing hour by hour, and build a habit that lasts. No ads, no clutter.

Download on theApp Store Coming soon toGoogle Play

Free · No ads · English and Arabic · Private by design

The Hourglass timer with a 16-hour fast at 14:12

How it works

Three taps, zero guesswork

Pick a plan, tap start, and watch each stage arrive.

01
Pick your plan
16:8, 18:6, 20:4, OMAD or your own hours. Change it whenever you like.
02
Tap start
The ring fills as the hours pass. Pause, edit or end early without losing anything.
03
Watch your body work
Each stage lights up as you reach it: fed, sugar burning, ketosis, autophagy.
04
Glance, don't open
Your fast lives on the Lock Screen, in the Dynamic Island and on Apple Watch.

Everything you need

Small app, big habit

All the tools to fast with confidence, without the clutter.

Your fast, right on the Lock Screen

Live Activity and the Dynamic Island keep the timer in view. Home and Lock Screen widgets too.

Fasting Goal 11:30 PM

14:12 Ketosis onset · 1:47 left

Know what's happening inside

Fed, glycogen, ketosis, autophagy. Every stage comes with a short, plain explanation.

Fed state0–4 h
Sugar burning4–12 h
Ketosis12–18 h
Autophagy18 h+

Streaks that keep you goingStatistics, streaks, achievements and goals. Your week at a glance.
Weight and bodyTrack weight, measurements and BMI with clear trends.
Ramadan modeSuhoor and iftar times from the prayer times where you are.
PDF reportA clean summary to keep or share with your doctor.
English and ArabicA full right-to-left layout, not a translation bolted on.
No ads, everAnd we never sell your data.

Apple Health

Works with Apple Health

Today's steps, active energy and last night's sleep, right next to your fast.

Steps, active energy and sleep on Home, read from Health
Weight syncs both ways, so smart-scale weigh-ins arrive on their own
Steps, energy and sleep stay on your iPhone. Only weights are saved to your account
Off until you turn it on, with one switch for each kind of data

Hourglass Home with today's steps, active energy and sleep from Apple Health

Apple Watch

Your fast on your wrist

Raise your wrist to see the ring fill and the stage you're in.

Start, pause and end a fast without your phone
A tap on your wrist at your goal and at each new stage
Complications to keep your fast on your watch face

The Hourglass Apple Watch app with a 16-hour fast at 14:12

Ramadan mode

Made for the holy month

Suhoor and iftar times from the prayer times in your city. A calm screen that counts down to iftar, and fasts that keep your streak going.

Suhoor: 4:52 AM
Iftar: 5:41 PM
Until iftar: 3h 12m

Example times for Makkah. The app uses your own city.

Circles

Better together

Start a private circle with friends or family. Cheer each other on with a tap and see who's fasting right now.

You choose what they see: everything, percentages only, or nothing
Report, block or remove members at any time
Invite only, with a private code

Your fasts are yours

We built Hourglass the way we'd want our own health data treated.

No ads

Not now, and not later.

Never sold

We don't sell your data or share it with advertisers.

You're in control

Delete your account and all your data from Settings at any time.

Questions, answered

Is Hourglass free?

Yes. Download it for free and track your fasts, stages, history and streaks at no cost.

Is there an Android app?

Not yet. Hourglass is on iPhone today, and Android is on our list.

Does it work in Arabic?

Fully: a right-to-left layout, Arabic notifications, and Ramadan prayer times.

Do I need an account?

Yes, so your fasts are saved and synced. Sign in with Apple, Google or email.

Does it work with Apple Watch?

Yes. The watch app shows your fast with its ring and stage, lets you start, pause and end it, and taps your wrist at your goal and at each new stage. Add a complication to keep it on your watch face.

Does it read my Health data?

Only if you turn it on, in Settings → Apple Health, with one switch for each kind of data. Steps, active energy and sleep are read on your iPhone and never leave it. Weight syncs both ways with Health and is saved to your Hourglass account, like any weight you log.

Is intermittent fasting safe for me?

Hourglass is a wellness tool, not medical advice. If you are pregnant, breastfeeding, diabetic, or have a medical condition or a history of eating disorders, talk to your doctor before fasting.

Your next fast starts with one tap

Free on iPhone. Android coming soon.