ChronoCheck – AI Authentication & Market Value for Luxury Watches
The smartest watch app for collectors, buyers and sellers. AI-powered authentication in seconds, live market value tracking, professional portfolio management and a unique collector game – all in one app. Developed by a certified watch expert, for everyone who takes watches seriously.
AI AUTHENTICATION
Just take a photo – seconds later you'll know whether your Rolex, Omega, Patek Philippe or one of 18 other top brands is genuine. Our AI draws on over 1,000 database references, continuously expanded with expert knowledge from a certified appraisal office. Subtle dial deviations, incorrect case finishing, flawed engravings – ChronoCheck detects what the naked eye misses.
Pre-Check before buying
NEW About to buy privately or from a marketplace? Send the seller a Pre-Check link. They upload photos — you get an AI verdict in under a minute, before transferring money.▸ Listing-Check for eBay & Kleinanzeigen Paste a listing URL — photos are loaded automatically, AI verifies authenticity.
PORTFOLIO & MARKET VALUE
Real-time market values from 4 independent sources (Chrono24, eBay & others). Interactive value chart over months and years. Profit/loss analysis per piece and total portfolio. Multi-currency: EUR, USD, CHF. Push notifications for significant price movements.
TIMEGRAPHER 2.0 (Premium)
Professional rate measurement on your iPhone – no expensive equipment needed. Microphone mode with live diagram, optical photo measurement synced to atomic clock, measurement history with trend analysis and drift alerts, 6-position test (DU/DD/CR/CL/CU/CD), automatic calibre detection.
WATCH GAME (NEW)
Rate other collectors' watches, earn points, badges and streaks. 11 achievements, 6 levels from Rookie to Legend, global leaderboard. Daily streak bonuses, credits redeemable for premium features. Fully anonymous via auto-generated nicknames.
PURCHASE LEADS
Upload photos, receive non-binding offers from verified dealers – no marketplace stress, no negotiation pressure.
EXPERT REVIEW
A certified appraiser examines your watch personally and delivers a written expert opinion including authenticity and market value assessment. Just 14.99 EUR per review.
PRICING
Free: 2 analyses, watchlist & community access
Basic (4.99 EUR/month): 10 analyses, detailed indicators
Pro (14.99 EUR/month): 40 analyses, full database, priority support
Single analysis: 0.99 EUR on demand – no subscription needed
About ChronoCheck: Operated by the appraisal office of Marcus Gier in Cologne – over 10 years of professional watch authentication experience. Every analysis is based on genuine expert knowledge, not algorithms alone.
Privacy: Images are transmitted encrypted and never stored or shared. Fully GDPR-compliant from day one.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
ChronoCheck is an excellent app for luxury watch collectors. The AI watch authentication is quick, and the market value estimates help me stay informed before buying or selling. A must-have watch app.
More reliable sign in: you stay logged in. Improvements to purchases and subscription restore. Minor bug fixes.
Version 1.0.7
The developer, Marcus Gier, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
Usage Data
Data Linked to You
The following data may be collected and linked to your identity:
Purchases
Contact Info
User Content
Identifiers
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
Usage Data
Diagnostics
Privacy practices may vary, for example, based on the features you use or your age. Learn More
The developer indicated that this app supports the following accessibility features. Learn More
Supported Features
Dark Interface
Differentiate Without Color Alone
Sufficient Contrast
Information
Seller
Marcus Gier
Size
40.2 MB
Category
Business
Compatibility
Requires iOS 15.1 or later.
iPhone Requires iOS 15.1 or later.
iPod touch Requires iOS 15.1 or later.
Mac Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
