ChronoCheck

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/ SUBSCRIPTION Market news is free to read. All other features are included in a subscription (Basic or Pro, monthly, cancel anytime). The expert review can be booked separately.