Watch collection tracker · iPhone

What's on your wrist today?

WORN keeps every watch you own in one box, logs the one you're wearing each day, and works out what each has cost you per wear. It measures your wrist too, so you know what size fits before you buy.

Download on the App Store Find your watch size

Five stars on the App Store · Free on iPhone · 20 Credits to start

The box opening, in the next update

The WORN letter

Watches, one letter at a time.

Now and then, a note when WORN changes, and short pieces on how watches work and where they come from. No spam, and one click to leave.

Watch wear tracker

One watch a day, logged in a tap.

Tap the watch you put on, or point the camera at your wrist with Point & Wear and WORN names the watch and logs the day. The diary keeps every wear on a paper calendar with the prints you took, and your rotation shows which pieces are getting wrist time and which are still in the box.

Point & Wear, the diary and the wear log are free.

Before you buy

The questions a photograph can't answer.

Photographs of watches are taken on someone else's arm. These four are answered on yours.

Wrist size

Does this watch fit my wrist?

Hold your iPhone over your forearm and the depth camera measures your wrist, edge to edge, and reports the circumference in millimetres. The reading is taken in three dimensions, so the angle you held the phone at cancels out, and the scan only settles once repeated readings agree. From then on every watch in WORN is drawn against that number.

Free, and it happens on your device. If your iPhone has no depth camera, set your wrist size by hand.

Try the watch size calculator

Try-on

Try a watch on before you buy it.

One photo of your wrist, taken once and kept. Any watch can then be laid onto it at its real case diameter, so a 36mm dress watch and a 44mm diver land differently on the same arm and you can tell which one you actually want. That measured fit is drawn on your device and costs nothing.

If you want the photoreal version, an AI render arrives as an instant print that develops on screen, with the size check written on its border.

A render costs 5 Credits, or 10 on the pro model. You are charged only when a picture actually comes back.

Discover

Ten watches a night, then the tray closes.

A catalogue of 46,257 pieces, dealt ten at a time from a closed tray. When the ten are judged the night is over, which is the opposite of a feed. Tap a card and the piece gets a study page: a monograph on the watch, its movement, its maker and its material.

Accuracy

Is it running well?

Rest your iPhone against the caseback for thirty seconds and WORN listens to the movement's beat, then answers the only question you actually have. Drift comes back in seconds a day, with the confidence interval attached. Readings are kept as an accuracy log per watch, so you can see a service coming instead of being surprised by it.

Listening costs no Credits and needs no network.

Cost per wear

What each watch has cost you, per day on the wrist.

What you paid divided by the days you actually wore it, kept for every watch as you log your wears, alongside your rotation and how long each piece spends on the wrist. The honest number usually argues for wearing more rather than buying more.

Work out a watch's cost per wear

$3,200per wear, after 1 day on the wrist

How a watch works

The parts inside, one at a time.

Two short hand-drawn films from WORN on the mechanical watch. Power: the coiled strip of spring steel that runs it. The Train: the wheels that carry that power to the hands, one turning once an hour, another once a minute.

PowerThe mainspring and the barrel that holds it.

In meshThree wheels, each turning at the rate its teeth give it.

The TrainThe wheels that carry power to the hands.

The Grand Tour of Time

109 true stops in the history of telling time.

From a 42,000-year-old tally bone to the atomic clock: the real story, fact-checked, behind every chapter of WORN's in-app Grand Tour.

c. 42,000 years ago · Border Cave

The Bone With Twenty-Nine Cuts

1090s · Kaifeng

The Clock Tower Nobody Could Rebuild

1955 · Teddington

Where the Second Stopped Belonging to the Sky

Read the Atlas

A day in WORN

The app, as it is on the phone.

The WORN Collection page: today's ritual, asking what you will wear today, with Point & Wear and a spinning wheel to choose

Morning

What will you wear today?

The day opens on your box and one question. Point the camera at your wrist and WORN names the watch and logs the day, or pick it yourself.

The watch

Each piece in its own room.

Every watch keeps its photographs, its reference and calibre, how many times you've worn it and a thirty-day rotation strip.

The diary

Every wear, on a paper calendar.

The month fills in as you wear, one watch a day, with your wrist shots and journal entries beside them.

The ledger

What each watch has cost, per wear.

What you paid, divided by the days you actually wore it, for every watch and the whole collection.

Tonight

Ten new watches, read against your wrist.

Measure your wrist once and every watch in Discover says whether it sits proportional or overhangs, before you buy.

From the App Store

Five stars on the App Store.

A true companion

"This app made me feel closer to my watches and the way I use them. I am someone who has a lot of watches but mostly fail to wear them on a regular basis."

RogerFederer009 · 21 Jun 2026

Beautifully Designed App for Watch Lovers

"Loved the concept behind WORN. The app feels premium, clean, and nicely put together. It gives watch collectors a dedicated space to build and enjoy their collection in a more organized and personal way."

Pranav295 · 25 Mar 2026

Eagerly waiting for the community

"I enjoyed putting up my watch in the virtual box and it was such a beautiful journey. The app recommended me some really interesting Reddit posts about my watch that I wouldn't have come to check."

ShruGupta301 · 23 Jun 2026

Latest from the community

News

Wrist CheckSeptember 16, 2026

Credits first · Premium optional

What it costs.

Every watch you own gets a Slot, free. The diary, the wear log, the listening and the measured fit are free too. Only the AI pictures cost Credits, and your first AI action is on us. WORN Premium is there if you use those often enough to stop wanting to count them.

TO START

free when you install

A welcome gift, no card and no account required

AI action on the house

Your first render or pairing costs you nothing

for a friend who joins

Ten to them, ten to you, when they redeem your code

SPEND

per wrist render

10 on the pro model. Charged only when a picture comes back

per Mirror pairing

AI picks a watch for your outfit photo

for everything written

Style chat, Point & Wear, journal prompts and Watch Slots cost nothing

30 cr

$5.99

$0.20 per Credit · six wrist renders

POPULAR

120 cr

$19.99

$0.17 per Credit · best for regular use

BEST VALUE

350 cr

$49.99

$0.14 per Credit · lowest price

WORN PREMIUM · OPTIONAL

75 Credits on every renewal, about fifteen wrist renders or seven Mirror pairings, and what you don't spend rolls into next month

$9.99/mo

or $79.99/yr · 14-day free trial

Everything else is free for everyone

Every Watch SlotWrist measurementThe measured fitAccuracy logTonight's tenStudy pagesStyle chatPoint & WearJournal promptsWishlistService historyWear heatmapFull historyCSV export

Credit packs are a one-time consumable purchase; WORN Premium is an auto-renewing subscription. Both are charged to your Apple ID at confirmation. Purchases are non-refundable, your Credits never expire, and you can cancel Premium any time in your App Store settings.

Questions

Tracking a watch collection, answered.

Is there an app to track my watch collection?

Yes. WORN is a watch collection tracker for iPhone. Every watch you own gets its own place in a box, with its photos, box and papers, what you paid and its service history, and the collection syncs through your own private iCloud.

How do I track which watch I wear each day?

Tap the watch you put on, or point the camera at your wrist with Point & Wear and WORN names the watch and logs the day. The diary keeps every wear on a calendar, with your rotation, your streak and the hours each watch spent on the wrist.

What size watch fits my wrist?

Divide your wrist's circumference by pi to get the width across its top, then look for a watch whose lug-to-lug length is about 85 to 95 percent of that. For a round case, lug to lug is roughly 1.2 times the diameter, so a 165 mm (6.5 in) wrist suits a case of about 38 to 41 mm. The watch size calculator works it out for any wrist, and the app measures your wrist with the iPhone's depth camera.

What is cost per wear?

What you paid for a watch divided by the days you have actually worn it. WORN keeps that number for every watch as you log your wears, and it usually argues for wearing what you own more rather than buying more.

Is WORN free?

Yes. Every watch slot, the diary, the wear log, the wrist measurement, the measured fit and listening to your movement are free. Only the AI pictures, such as a photoreal try-on, cost Credits, and you get 20 when you install.

Is WORN on Android?

WORN is on iPhone today. An Android version is in the works.

Your watches stay on your device.

Your collection, your wear diary, your wrist photo and your recordings live on your device and sync through your own private iCloud database, which we cannot read. No photo leaves the phone in the background, and every AI feature is a deliberate tap.

Download on the App Store

Free on iPhone · 20 Credits to start · Premium optional · Privacy policy