CrownSide

For the watches you actually care about. Log daily wear, track accuracy drift, and keep every service record — private, on-device, yours.

CrownSide is the watch journal built for enthusiasts who care about the details. Whether you own one cherished piece or a growing collection, CrownSide helps you track every wear, every service, and every tick — all in one place.

Your Collection, Organized

• Add each watch with a photo, brand, model, serial number, purchase date, and personal notes. Everything you need to know about a watch is always a tap away.

Daily Wear Log

• Record which watch you wore each day — swipe right on a watch to log it in one motion. Browse your wear history on an interactive calendar and see yearly summaries with per-watch streaks — a personal diary of time on the wrist.

Accuracy Tracking

• Measure your watch's timekeeping performance over time. Log offset readings, filter by winding position, visualize drift on a scrollable chart, and see seconds-per-day rate for each entry. Know exactly how your movement is performing.

Maintenance History

• Keep a complete service record for every watch. Log overhauls and repairs with dates and notes, so you always know when a watch last saw a watchmaker.

Private by Default

• No account. No subscription. Your data lives on your device.

Export & Import

• Back up your watches or move them between devices with a single JSON export. Your data is always yours.