Best apps to track your watch's power reserve and winding

Only two iPhone apps track whether your mechanical watches are still running: Watch Winder and WatchKeep. The others are collection managers and timegraphers, which are great at different jobs. Here's how they compare.

Disclosure: we make Watch Winder. Everything about the other apps comes from their App Store listings and websites, checked in September 2026. "Not listed" means the listing doesn't mention it, not that it definitely isn't there.

At a glance

App	Reserve / stopped status	Wear suggestion	Timegrapher	Apple Watch	Price model
Watch Winder	Live countdown per watch	Yes	No	App and complications	Free for 3 watches; one-time Pro
WatchKeep	"Running" / "May have stopped"	Not listed	Not listed	Not listed	Free for 3 watches with ads; weekly or lifetime Premium
Klokker	Not listed	Yes	Manual timegrapher logs	Not listed	Free, no ads
Vellore	Not listed	Yes	Yes (Pro)	Not listed	Free; one-time Pro; optional AI subscription
WRotate	Not listed	Not listed	Yes	Not listed	Free, no ads
tickIQ	Not listed	Not listed	Yes	Not listed	Free; subscription or lifetime
WristLog	Not listed	Not listed	Yes	Not listed	Free on the web; Premium in the apps

Watch Winder: best for keeping every watch running

Watch Winder counts down each watch's power reserve. Hand-wound watches count from each wind. Automatics charge while you wear them and count down once you take them off. It sends a "wind soon" reminder before a watch stops, suggests which automatic to wear next, and lists the hand-winders to wind today. It knows the reserves of 86 popular movements, so typing a watch's name fills in the reserve.

Pro adds an Apple Watch app with complications, home-screen and Lock Screen widgets, a Live Activity and Siri. It doesn't measure accuracy or catalogue values; pair it with a timegrapher app if you want that.

Pick it if: you own several mechanical watches and are tired of finding them stopped.

WatchKeep: service and winding reminders

WatchKeep shows whether each watch is "Running" or "May have stopped", based on the last day you wore it, and sends staged service reminders. Premium adds unlimited watches, a service log and grouping by winder, safe or case. Its listing is iPhone-only and doesn't mention an Apple Watch app. Watch Winder vs WatchKeep.

Pick it if: service reminders matter more to you than a live reserve countdown.

Klokker: best free collection manager

Klokker catalogues your collection, logs what you wear, suggests what to wear next each week, and keeps a service book with timegrapher readings you enter. It's free with no ads, on iPhone and iPad. Watch Winder vs Klokker.

Vellore: collection, widgets and Siri

Vellore is a polished collection app with wear logging, a "Pick for Me" randomizer, a Watch of the Day widget, logging through Siri Shortcuts, and service and maintenance reminders. Pro, a one-time purchase, adds a microphone timegrapher. AI features cost extra.

WRotate, tickIQ and WristLog: accuracy first

All three measure your watch's rate through the phone's microphone and log what you wear. WRotate is free with no ads and has a social side. tickIQ tracks wear automatically from wrist shots and predicts service needs. WristLog is free on the web, with paid Premium options in its apps.

What about Toolwatch?

Toolwatch.io is a well-known free accuracy tool on the web and Android, but its iPhone app hasn't been updated since 2017.

Or use two

These apps overlap less than it seems. Many collectors use a collection or timegrapher app for records and Watch Winder for the daily job of keeping everything wound.

Coming soon to the App Store Try the free calculator

FAQ

Is there an app that reminds you to wind your watch?

Yes. Watch Winder tracks each watch's power reserve and reminds you before it stops, and WatchKeep shows a "May have stopped" status with service and winding reminders.

Is there an app that tracks a watch's power reserve?

Watch Winder counts down the reserve of every watch you own, using the published figure for its movement and your wear and winding.

Which watch app works on Apple Watch?

Of the apps compared here, Watch Winder is the only one whose listing includes an Apple Watch app and complications.

What's the best free app to measure watch accuracy?

WRotate is free with no ads and has a microphone timegrapher. Klokker is free too, but you enter timegrapher readings by hand.