# Calibre: Watch Collector — Mechanical Watch Timegrapher > Mechanical Watch Timegrapher (iPhone/iPad app by Tim McNerney.) - Source: https://appshunter.io/ios/app/calibre-watch-collector/id6765990904 (this page in markdown: same URL + `.md`) - Developer: [Tim McNerney](https://appshunter.io/developer/1896154152) - Category: Utilities, Lifestyle - Price: Free with in-app purchases - Age rating: 4+ - Requires: iOS 17.0 · 10 MB - Languages: American English, French (France), European Spanish - Released: 2026-06-12 - Data updated: 2026-08-18 - User reviews in markdown: https://appshunter.io/ios/app/calibre-watch-collector/id6765990904/reviews.md ## What is Calibre? Calibre is a precision instrument for your pocket — a software timegrapher that measures the accuracy of mechanical watches using your device's wired or built-in microphone. Place the microphone so that it can pick up the sound of your watch/movement and Calibre begins listening immediately. The escapement's tick and tock are detected in real time and the app computes the same measurements as a physical paper-tape timegrapher: • Rate deviation — seconds per day gained or lost relative to nominal • Beat error — asymmetry between the tick and tock intervals in milliseconds (preview) • Amplitude — the arc of the balance wheel in degrees (preview) • BPH — the beat frequency of the movement, detected automatically or set manually A scrolling paper-tape trace gives you a live visual of timing consistency. An ensemble beat waveform view overlays averaged tick and tock cycles for detailed acoustic inspection. Confidence bars and real-time signal quality indicators guide you to the best microphone placement. WATCH LIBRARY Build a library of watches/movements with individual profiles — lift angle, nominal BPH, caliber notes and full measurement history. Measurements are grouped by dial position when you measure the same watch in multiple orientations and a rate history chart shows how accuracy changes over time. Service events mark the start of a new era so pre-service data is retained but excluded from current analysis. REAL-WORLD COMPARISON Manual timing runs let you log (real time, watch time) pairs over hours or days. Linear regression computes drift rate, current offset and R², letting you compare bench measurements against the watch's actual performance on the wrist. AUDIO PIPELINE Separate DSP profiles for built-in, wired and Bluetooth microphones switch automatically when the audio route changes. Optional AudioKit Butterworth filters, software AGC, adjustable detector threshold and envelope release give you precise control over how the signal is processed. An on-demand signal analyser inspects the live audio feed and suggests filter and gain settings as individually-appliable cards. FULLY OFFLINE No account required. No network requests. No analytics or telemetry. All measurement data stays on your device. Calibre is designed for watch enthusiasts, collectors and watchmakers who want data at their fingertips. LEGAL Privacy Policy: https://calibrewatch.app/privacy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Calibre Pro Annual | $4.99 | per year | **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Calibre Pro | $14.99 | one-time | ## Version history (last 4 releases) ### 1.3 — 2026-08-10 Welcome to Calibre 1.3. MORE ACCURATE AMPLITUDE Amplitude is now measured from an average across many beats instead of one beat at a time. Readings are steadier, quiet watches measure more reliably and movements that used to pin the reading at 360 degrees now report correctly. BETTER WEB CAPTURE Extracting specs from a product page now pulls dimensions (lug to lug, lug width, thickness), weight and price. AI enrichment fills gaps and corrects the scrape. Preview the extracted fields before applying and tap any you want to skip. PDF EXPORT & SAVE TO FILES The PDF report is a clean one-sheet with your watch photo, comprehensive specs and a performance summary. Save it directly to a Calibre folder in the Files app. WATCH DETAIL & PHOTOS Tap the hero photo to view it full screen with pinch-to-zoom. Find Image fetches product photos from the URL so you can pick one without leaving the app. Paste Image now works reliably on all iOS versions. ALSO - Filter the Watches list to Have, Want or All with one tap - Retail price and estimated value fields on each watch - Select and copy spec values from the watch detail screen - Sub-second drift rates show two decimal places - iPad: controls no longer overlap the tab bar - VoiceOver improvements across the measurement screen - Updated Spanish and French translations ### 1.2 — 2026-06-26 Welcome to Calibre 1.2. LIBRARY VIEWS The Watches tab gains a photo grid. Tap the toolbar button to switch between grid and list. Grid cells are larger on iPad to show more detail and watches. FILTER AND SEARCH Filter the library by movement type or brand. Search by name, brand, model or caliber. The filter button highlights when a filter is active. PDF WATCH REPORT Export a formatted PDF for any watch from the share menu: specs, rate-history chart, measurement table, service history, magnetism readings and timing runs in one document. BRANDS Brand autocomplete now spans hundreds of makers including a large catalog of micro brands. When a brand is recognised you can tap through to its official homepage in an in-app browser. MOVEMENTS The built-in caliber database has nearly doubled. It adds more mechanical movements, a wide range of quartz movements and Seiko Spring Drive. Choosing a known caliber fills the movement type automatically and skips beat rate and lift angle where they do not apply. ADD WATCH It is now possible to add a watch via a web search. AMPLITUDE MEASUREMENT Improvements to timegrapher amplitude measurements. FIXES • Corrected the magnetism sensor reticle position on iPhone • Magnetism readings are hidden for watches marked as wanted • Consistent typography across the app ### 1.1 — 2026-06-18 Welcome to Calibre 1.1. A lot has been added since the initial release. FIRST-RUN TOUR A guided carousel walks through how Calibre works, how to position your watch, the library and long-term tracking. It appears once on first launch and can be replayed from Settings → About → Show Welcome Tour Again. WATCH LIBRARY Build a full collection. Each watch stores lift angle, nominal beat rate, caliber notes, service events and measurement history. Multiple dial positions are tracked separately, and a rate-history chart shows accuracy over time. New: physical dimensions (lug-to-lug, thickness, weight) and status tracking (owned vs. wanted). APP SHORTCUTS AND SIRI "Start measuring my Speedmaster" and "Check magnetism on my Seiko" work from Siri, Shortcuts and the Action button. Your watch names appear as parameters. MAGNETISM DETECTOR Check a watch for magnetic exposure before service. The detector uses the device magnetometer and marks the high-water peak so you can move the watch away from the sensor and read the result. Readings are saved per watch with a timestamp. AUDIO AND SIGNAL IMPROVEMENTS Separate DSP profiles for built-in, wired and Bluetooth microphones, with per-profile filter and gain settings. An on-demand signal analyser inspects the live feed and suggests filter cutoff and gain adjustments as individually-appliable cards. FRENCH AND SPANISH The full app, including measurement readouts, watch library and settings, is available in French and Spanish. GENERAL • Play back raw and processed audio clips from each measurement session • Rate-history trend chart with service-event markers • Image crop and position controls when adding a watch photo • Real-time signal quality indicators and confidence bars during measurement • Dial position grouping and per-position history on the watch detail page ### 1.0 — 2026-06-12 No release notes. ## Apps similar to Calibre | App | Rating | Price | Category | | --- | --- | --- | --- | | [Unruh - Watch Accuracy](https://appshunter.io/ios/app/unruh-watch-accuracy/id6760858048) | 4.0 (1) | Free | Utilities | | [Tickscope — Watch Accuracy](https://appshunter.io/ios/app/tickscope-watch-accuracy/id6761128998) | 4.6 (8) | Free | Utilities | | [Watch Tracker - Collection](https://appshunter.io/ios/app/watch-tracker-collection/id6752223953) | — | Free | Utilities | | [Chronograde: Watch Accuracy](https://appshunter.io/ios/app/chronograde-watch-accuracy/id6774091390) | — | Free | Utilities | | [Tempochron: Watch Timegrapher](https://appshunter.io/ios/app/tempochron-watch-timegrapher/id6767587425) | — | Free | Utilities | | [Isochron: Watch Accuracy](https://appshunter.io/ios/app/isochron-watch-accuracy/id6780989450) | — | Free | Utilities | ## More apps by Tim McNerney - [Commutre](https://appshunter.io/ios/app/commutre/id6772584362) All apps by Tim McNerney: https://appshunter.io/developer/1896154152 ## Related topics [iarvel](https://appshunter.io/ios/topics/iarvel) · [watch collector](https://appshunter.io/ios/topics/watch-collector) · [tick talk watch](https://appshunter.io/ios/topics/tick-talk-watch) · [caliber free](https://appshunter.io/ios/topics/caliber-free) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-18.*