FOR PEOPLE WHO LOVE WATCHES

Your collection, precisely.

Horology keeps every watch you own in one beautiful place. Log what is on your wrist, measure how accurate each watch really is, and know when it is due for service.

For iPhone and Apple WatchComing soon

Coming soon to the App Store, in English.

See how it works
Horology's Today screen on iPhone 18 Pro: a Rolex Submariner Date on the wrist with a 7-day streak, worn 36 times and running 2.1 seconds a day fast, above a week of watch dials
A COLLECTOR'S TOOLKIT
  • Your whole collection
  • Daily wear tracking
  • A pocket timegrapher
  • Service reminders

THE APP

Collect. Wear.
Measure.

Horology brings together the things collectors usually keep in spreadsheets, notes and separate apps.

Every watch, beautifully kept.

Photos, reference and serial numbers, movement, calibre and purchase details, plus a wishlist and the pieces you have sold. Every watch gets a dial drawn in its own colors.

Know what you really wear.

Log today's watch in a tap and keep your streak going. Not sure what to wear? Pick for me favors the watches that have waited longest for wrist time.

Measure like a watchmaker.

Time Check compares your watch with atomic time over a day. The Timegrapher listens to the escapement through your iPhone's microphone for rate, beat error and amplitude.

ACCURACY

Every second,
accounted for.

Follow each watch's rate over time, see how it runs in six positions, and find out which piece in your collection keeps the best time.

  • A reference clock synced with time.apple.com
  • Timegrapher readings in about 30 seconds
  • A six-position test with average and delta
Coming soon
A watch's Accuracy section in Horology on iPhone 18 Pro: plus 2.1 seconds a day, rated chronometer grade, a rate chart from June to October and a six-position test with rate and amplitude for each position
Rate history and a six-position test for one watch.

MORE TO LOVE

On your wrist.
In your hand.

Horology is free to start with up to three watches. Horology Pro unlocks unlimited watches, the Timegrapher, Insights, accuracy history, service reminders, exports and Studio photos.

Insights.

Cost per wear, a rotation score, collection value and the days you reach for each watch.

Service, on time.

Log every service and battery change, and get a reminder when the next one is due for that movement.

Apple Watch and widgets.

See and log today's watch from Apple Watch, the Home Screen and the Lock Screen.

Ready for your insurer.

Export a polished PDF report of your collection, or a spreadsheet of every detail.

Private by design.

Your collection stays on your iPhone, with no account to create. Microphone audio is analyzed on your device and never recorded.

A note on measurements

Horology's Timegrapher uses your iPhone's microphone, so its readings are a helpful guide rather than a lab measurement. A watchmaker's timegrapher remains the reference for regulation and service decisions.

Watch names shown are examples and belong to their owners. Horology is not affiliated with any watch brand.

COMING SOON

The watch lover's
companion.

Horology is getting ready for the App Store, for iPhone and Apple Watch.

Say hello

Questions or ideas? Write to support@horology.app.