Horolens - Watch Collection

Measure your watches' accuracy, track what you wear, and never miss a service again.

Horolens is the app for watch enthusiasts: your collection, your workshop and your stats, all in your iPhone. One favorite piece or dozens of timepieces? Add them in seconds thanks to a built-in catalog of over 35,000 references.

WHY HOROLENS?
- A real timegrapher in your pocket
- Wrist time tracking you can automate with NFC
- Private data, synced across all your Apple devices
- One-time purchase, no subscription

WORKSHOP TOOLS & ACCURACY DIAGNOSTICS
Turn your iPhone into a watchmaker's bench:
- Built-in timegrapher (Timegrapher PRO): analyze your movements with the internal microphone or an external sensor. Daily rate (s/d), balance amplitude and beat error, using a clustering algorithm.
- Atomic NTP clock: set your watches precisely, with haptic feedback and an audible signal at the top of the second.
- Real-time moon phase: geolocated astronomical calculation adapted to your hemisphere, illumination, lunation age, countdown to the full moon and an interactive setting guide.
- "Danger Zone" alert: an indicator warns you during the critical window (8 PM - 3 AM) to protect the date-change mechanism.
- Magnetic detector: measure ambient magnetic fields with your iPhone's magnetometer to quickly spot a magnetized hairspring.

STATS & WRIST TIME
Don't just store your watches, understand your habits:
- Global dashboard: total value invested, breakdown by style, movement type or brand, and location (safe or home).
- Per-watch stats: precise wrist time, monthly and yearly wear rate, exact number of days worn.
- Morning routine & NFC: log today's watch in one tap, or stick an NFC tag or QR code on each box and tap your iPhone to put it on your wrist instantly.

ADVANCED COLLECTION MANAGEMENT
- Complete spec sheet: reference, serial number, lug-to-lug, thickness, power reserve, water resistance, crystal type.
- Service alerts: log your service history and get a notification when the recommended interval is exceeded.
- Smart search: filter by brand, model, reference, caliber, material or complication.
- Strap Super Filter: in your Strap Garage, combine material, color and exact lug width to find the perfect combination.

ICLOUD & PRIVACY
- iCloud sync: your collection, HD photos, service history and measurements are automatically available on all your Apple devices.
- Your data stays in your personal iCloud space. It never passes through third-party servers, and the developer collects none of it.

PROFESSIONAL EXPORTS
- Watch Passport PDF: a complete, elegant file for each watch, for insurance or personal records.
- Bill of Sale PDF: a ready-to-use sales certificate generated instantly with your details pre-filled.
- CSV export: your whole inventory in one tap, compatible with Excel, Numbers and Sheets.

FREE OR HOROLENS PRO?
- Free: up to 4 watches, with iCloud sync, atomic NTP clock, moon phase, magnetic detector and CSV export.
- Horolens PRO (one-time purchase, no subscription): unlimited watches, Timegrapher PRO, professional PDF exports and direct support for independent development.

Built by an enthusiast, for enthusiasts.