For mechanical-watch owners

Your watch
companion.

Set it with confidence. Understand what it shows. Keep the references and instruments you need close at hand.

Explore JusterePrivacy by design
Coming soon to Google Play · App Store planned
JUSTERE•••
Today
Thursday · October 9
Justere watch
10:10:26October 9, 2026
TodayMoonWatchesTools
Purpose-built

More useful than another watch database.

Justere is built around the practical moments of mechanical-watch ownership: setting a complication, finding the right reference, checking the sky or time, and keeping your own watches organized.

01 · Setting Assistant

Watch-specific guidance, step by step.

Follow clear instructions for the watch in front of you. Justere keeps procedural steps, verified references and complication-specific guidance together instead of making you search through manuals and forums.

Moon phase settingVerified guide
Moon phase reference
Today’s lunar referenceUse the indicated position as the astronomical reference before applying the watch-specific setting steps.
1
Move the crown to the setting position

Follow the control and safe-setting position specified for your watch.

2
Set the moon display to the reference

Use the verified direction and control for this profile.

3
Return the crown securely

Complete the procedure and return the watch to normal operation.

02 · Instruments

Time, light and sky — made practical.

Sunrise and sunset, World Time, GMT/UTC and advanced astronomical instruments are designed as companions to the information mechanical watches display.

InstrumentsLive references
Sunrise and sunset instrumentSunrise & SunsetLocal solar events
World Time instrumentWorld TimeGlobal reference
Sidereal time instrumentSidereal TimeAstronomical time
Moon altitude instrumentMoon AltitudePosition in the sky
03 · My Watches

Your collection, with context.

Save the watches you actually own and bring their relevant guides, complications and references into one personal workflow. The free version supports one saved watch; Pro expands the collection and advanced tools.

My WatchesPersonal collection
Mechanical moon phase
Moon phase · Date · Time
Saved
Annual calendar
Date · Calendar · Time
Guide ready
GMT watch
GMT · Time
Reference ready
Justere watch
Privacy by design

Your watches are your business.

Justere does not require an account, contains no advertising SDK and keeps core watch data on your device. Location supports astronomical functions — not advertising or profiling.

✓
No account requiredCore use does not depend on creating a Justere cloud profile.
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No advertising trackingNo ad network or behavioral advertising in the reviewed release.
✓
Core watch data stays localSaved watches, history and key preferences are designed to remain on the device.
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Launching soon

A calmer way to live with mechanical watches.

Justere is preparing for release on Google Play, with iPhone planned. Store links will appear here when the app is available.