Uair
Mechanical watch companion
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
New: the Collection. Keep every watch you own, and learn how fast each one really runs, by listening to its tick or checking it against the time. Try it free for 14 days.
Uair sets a mechanical watch to the second, then keeps a record of every watch you own and how each one runs.
SET IT
Pick a minute and Uair counts you in. Pull the crown to stop the seconds hand at 12, set the hands to the time on screen, and wait. The last three seconds fill the screen. At zero the screen flips and the phone taps in your hand: push in the crown. That's it, to the second, against your iPhone's network time.
FIVE FACES
Day-Date, GMT, Moonphase, Dive and Chronograph, each drawn for its complication: the date window, a second timezone on the 24-hour hand, today's moon, the bezel, the subdials. Each one comes with a short guide to what the hands are for and how to set them.
THE COLLECTION
Keep every watch you own in one place: photos, reference, serial, movement, what you paid, and every service. Uair lifts each watch out of its photo and sets them all at the same size, so the collection looks like one.
Then find out how it really keeps time:
• Listen. Lay the watch on the phone and Uair times its tick through the microphone. A rate in seconds a day, with beat rate and beat error, in about twenty seconds.
• Check the time. Tap as the seconds hand passes 12, again a day or two later. Over a few days of wear you get the rate on the wrist: every position, every temperature, the one that matters.
Rates are kept run by run, so you can see a watch before and after a regulation, and which ones have started to drift.
WIDGETS
A watch face for the Home Screen, Lock Screen and StandBy, and a Watch rate widget that shows how one of your watches is running.
PRIVATE
No account, no analytics. Your watches stay on your device, photos are cut out on the device, and the microphone sound is analysed as it arrives and never saved or sent anywhere.
PRICING
Setting your watch, the faces and the face widgets are free, always. The Collection is a one-time unlock with a free 14-day trial. The trial ends on its own and never charges you. Unlocking is one payment, with no subscription, and Family Sharing is supported.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
ChronoSync is now Uair (Gaelic for "hour"). Same app, new name, new look.
• The Collection: keep every watch you own, with photos, details and service history.
• Listen: lay a watch on the phone and get its rate from the tick in about twenty seconds.
• Check the time: tap as the seconds hand passes 12, and learn how a watch runs on the wrist.
• Watch rate widget.
• A redrawn sync: the last three seconds fill the screen, and the screen flips to "Now." at zero.
• A new matte Day-Date dial, and 12-hour time throughout.
Setting your watch stays free. The Collection is a one-time unlock, free to try for 14 days.
The developer, Dominic McPhee, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Dominic McPhee
- Size
- 4.9 MB
- Category
- Utilities
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later. - iPad
Requires iPadOS 26.0 or later. - Mac
Requires macOS 26.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- 14-day Trial $0.00
- Uair Collection $4.99
- Copyright
- © 2026 Happy Orbit Labs