Mainplate
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Track what your watches are worth, log every buy and sell, and know exactly what to wear today — one quiet, private app for iPhone, iPad and Mac.
Brand, model, reference and year. What you paid, and what it’s worth today. Box and papers, service notes and your own remarks — every watch reads like a catalogue plate, because Mainplate cuts each photo out for you automatically. Keep a wishlist of the ones you’re still chasing, and a record of the ones you’ve sold.
Follow a watch from bought, to in progress, to sold. Add up every cost along the way — parts, service, shipping, even your own hours at the bench — and read your profit and return at a glance, for a single deal or your whole register.
Take a reading, wait a few days, and take another. Mainplate works out how many seconds a day your watch gains or loses and shows it on a clean dial — measured against the very standards used to certify a chronometer. Keep the full history for every piece.
Can’t decide? Let Mainplate choose a watch from your collection, mark it as worn, and keep today’s pick on your Home Screen with the widget. It syncs to every device — because every piece deserves its day on the wrist.
Try it freeA precise reference clock with a sweeping seconds hand, the date, your timezone and a live moonphase. Follow the simple steps to set the time exactly — and to set a moonphase complication the right way, without harming the movement.
Crystals, movements, straps, tools — your parts inventory builds itself from the costs you log on each flip, sorted into tidy categories. So you always know what’s on the bench and what’s in the drawer.
Log the days you actually wear each watch. Mainplate turns its price into a cost-per-wear and shows what you really reach for — and what’s been sitting in the box.
Set a service interval and Mainplate keeps watch, so no movement quietly runs years past its due date.
Keep warranty cards, receipts and service papers with the watch they belong to — and export them, neatly set, as a single PDF.
Turn your collection — or a single watch — into a clean, gallery-style image, sized for Instagram, TikTok, X and more, ready to post in a tap.
Snap your watch and Mainplate lifts it cleanly off the background, so your collection looks like a catalogue, not a camera roll.
Gallery-black surfaces, fine hairlines and a single champagne accent — in light and dark, following your device. Built to feel at home beside your best watches.
Open Mainplate on any device and find the same collection, the same flips, the same history. iCloud keeps everything in sync automatically — nothing to set up, nothing to back up.
No account, no sign-up, no tracking and no third-party servers. Your collection lives in your own iCloud and nowhere else.
Made for the latest iPhone, iPad and Mac — quick to open, calm to use, and designed to feel like a precision instrument.
Whether you keep watches for the love of them or trade to fund the next one, Mainplate has the tools — and gets out of the way.
Collector
€1.99/mo
or €19.99 / year
Pro
€4.99/mo
or €39.99 / year
Subscriptions renew automatically · cancel anytime in your App Store account
Free to download. No account required.
Your watches, your data — always with you.
iPhone · iPad · Mac · iOS 17 or later