Tourbillon

A reference and tracking app for luxury watches, covering brands, models, movements, complications, and historical watchmaking.

The brand directory covers more than one hundred watch manufacturers with curated histories, founding years, countries of origin, and notable complications. Each brand page shows the current thirty-day average price across available models, a price trend indicator, and a searchable list of all models produced by that brand. Models within a brand are filterable by movement type, case material, and production era.

Individual model detail pages include the full reference number, movement caliber, years of production, case material, case diameter, and a complete description. A price history chart shows thirty day, ninety day, and one year trends with swipe interaction to see specific dates and prices. Related models within the same brand or complication family are suggested.

The search tool accepts free text queries across brand names, model names, reference numbers, movements, case materials, and descriptions. Filters refine results by brand, movement type (automatic, manual, quartz, tourbillon, spring drive), case material (steel, yellow gold, rose gold, white gold, platinum, titanium, ceramic), case diameter, and price range.

The complications guide explains over forty horological complications including the tourbillon, chronograph, perpetual calendar, moon phase, GMT, world time, minute repeater, equation of time, power reserve, jumping hour, retrograde, annual calendar, dead beat seconds, split seconds chronograph, grande sonnerie, foudroyante, constant force, fusee and chain, helium escape valve, tachymeter, and more. Each entry describes the function, inventor and year invented, the complication category, and example brands known for that complication.

The horology glossary covers more than two hundred terms across movements, cases, dials, complications, decoration techniques, materials, and straps. Terms include phonetic pronunciations for French and German words like guilloché, côtes de Genève, anglage, and perlage. Each term links to related terms and example brands that use the technique.

The collection tracker stores your owned watches with acquisition date, purchase price, serial number, condition rating, and box and papers indicators. Current market estimates pull from the API to show total portfolio value, gain or loss against purchase prices, and insights on the best-performing pieces.

The wishlist tracks watches you want with target prices and priority levels. When a watched watch drops to or below your target price, the app highlights it in a banner alert.

A price tracker dashboard displays sparkline charts for tracked models with thirty day percentage changes, biggest gainers and losers lists, and the option to create price alerts at specific target levels.

All personal data is stored on device. Watch data and prices are fetched from thewatchapi.com via an API token you configure in settings. No account required.