The collection tool built into Chrono24, the luxury watch marketplace running out of Karlsruhe, Germany since 2003. Adding a piece is quick: Watch Scanner reads a photo and pulls the model data, or the reference is picked from the catalog, after which purchase year, price paid and condition are entered. Estimated values refresh daily from marketplace listings and sales, charts show how the portfolio moved, and owned watches sit under "My Watches" while candidates wait in "Followed Watches" with price alerts.
Sensible for owners of mainstream references from Rolex, Omega, Tudor or Cartier who watch the money side, and it costs nothing beyond a free account. Microbrands, vintage oddities and everyday quartz get thin or absent valuations. There is no wear log, no service history field and no accuracy testing, so collectors of mechanical watches usually keep a second app next to it.
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