# Tempochron: Watch Timegrapher — Measure Rate & Beat Error > Measure Rate & Beat Error (iPhone/iPad app by Jan Sokol.) - Source: https://appshunter.io/ios/app/tempochron-watch-timegrapher/id6767587425 (this page in markdown: same URL + `.md`) - Developer: [Jan Sokol](https://appshunter.io/developer/1896490456) - Category: Utilities, Lifestyle - Price: Free with in-app purchases - Age rating: 4+ - Requires: iOS 17.0 · 6 MB - Languages: American English, Czech, Dutch, French (France), German (Germany), Italian, Japanese, Korean, Polish, Brazilian Portuguese and 5 more - Released: 2026-05-15 - Data updated: 2026-09-06 - User reviews in markdown: https://appshunter.io/ios/app/tempochron-watch-timegrapher/id6767587425/reviews.md ## What is Tempochron? Tempochron turns your iPhone into a practical timing companion for mechanical watches. Use the iPhone microphone or a compatible external input to listen to watch ticks, estimate rate, beat error, and timing stability. Or compare elapsed time between two dial photos: align each photo with an atomic-time reference to estimate daily rate without touching the watch. Save readings by watch for service notes, regulation checks, and before/after comparisons. Features: - Live rate and beat error measurement - Camera time checks with daily-rate history - Compatible external wired or USB microphones when iOS exposes them as audio inputs - Automatic BPH detection for common mechanical movements - Watch profiles with purchase, warranty, and service history - Private iCloud sync for watch profiles, care records, and measurement history; audio recordings stay on this device - Multi-position timing sessions for dial-up, dial-down, crown-up, crown-down, crown-left, and crown-right checks - Signal scope and advanced diagnostics for evaluating recording quality - CSV, JSON, PDF, and raw audio export tools with Tempochron Pro Tempochron is designed as a field screening tool, not a certified timing machine. Results depend on microphone contact, background noise, watch position, mainspring state, and movement condition. Use proper bench equipment for final regulation decisions. ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Tempochron Pro | $6.99 | one-time | ## Version history (last 5 releases) ### 1.11 — 2026-08-24 Take a time reading without touching the watch. • Measure daily rate from two dial photos, with an atomic-time reference and clear camera reading history • Keep purchase, warranty, next-service, and service history beside each watch • Sync watch profiles and measurement history privately across devices with iCloud • Use Tempochron more comfortably on iPad with a sidebar and improved Measure layout • Add manual readings with a clear source label, plus reliability fixes for saving camera readings and watch care ### 1.10 — 2026-07-30 Take a time reading without touching the watch. • Measure daily rate from two dial photos, with an atomic-time reference and clear camera reading history • Keep purchase, warranty, next-service, and service history beside each watch • Sync watch profiles and measurement history privately across devices with iCloud • Use Tempochron more comfortably on iPad with a sidebar and improved Measure layout • Add manual readings with a clear source label, plus reliability fixes for saving camera readings and watch care ### 1.9 — 2026-07-25 Take a time reading without touching the watch. • Measure daily rate from two dial photos, with an atomic-time reference and clear camera reading history • Keep purchase, warranty, next-service, and service history beside each watch • Sync watch profiles and measurement history privately across devices with iCloud • Use Tempochron more comfortably on iPad with a sidebar and improved Measure layout • Add manual readings with a clear source label, plus reliability fixes for saving camera readings and watch care ### 1.8 — 2026-07-23 Take a time reading without touching the watch. • Measure daily rate from two dial photos, with an atomic-time reference and clear camera reading history • Keep purchase, warranty, next-service, and service history beside each watch • Sync watch profiles and measurement history privately across devices with iCloud • Use Tempochron more comfortably on iPad with a sidebar and improved Measure layout • Add manual readings with a clear source label, plus reliability fixes for saving camera readings and watch care ### 1.7 — 2026-07-21 Improves watch tick detection tuning and adds benchmark-backed detector calibration for more reliable measurements. ## More apps by Jan Sokol - [Lulliq: Baby Monitor](https://appshunter.io/ios/app/lulliq-baby-monitor/id6768361730) - [WaxTap](https://appshunter.io/ios/app/waxtap/id6770549285) - [MotorQue: Car Dashboard & Scan](https://appshunter.io/ios/app/motorque-car-dashboard-and-scan/id6770917054) - [Flicker Safe: Test Light](https://appshunter.io/ios/app/flicker-safe-test-light/id6771406035) - [Clack Lab: Keyboard Analyzer](https://appshunter.io/ios/app/clack-lab-keyboard-analyzer/id6771406733) All apps by Jan Sokol: https://appshunter.io/developer/1896490456 ## Related topics [wristwatch](https://appshunter.io/ios/topics/wristwatch) · [mechanical watch](https://appshunter.io/ios/topics/mechanical-watch) · [caliber pocketcop 11](https://appshunter.io/ios/topics/caliber-pocketcop-11) · [avoid spikes for watch & phone](https://appshunter.io/ios/topics/avoid-spikes-for-watch-phone) · [backbeat timegrapher](https://appshunter.io/ios/topics/backbeat-timegrapher) · [tozo watch](https://appshunter.io/ios/topics/tozo-watch) · [tmuxonwatch](https://appshunter.io/ios/topics/tmuxonwatch) · [pegelwatch](https://appshunter.io/ios/topics/pegelwatch) · [tailwind watch](https://appshunter.io/ios/topics/tailwind-watch) · [polse watch](https://appshunter.io/ios/topics/polse-watch) · [aluratek frametime](https://appshunter.io/ios/topics/aluratek-frametime) · [saferwatch](https://appshunter.io/ios/topics/saferwatch) · [xplora watch](https://appshunter.io/ios/topics/xplora-watch) · [bezel watch](https://appshunter.io/ios/topics/bezel-watch) · [seafood watch](https://appshunter.io/ios/topics/seafood-watch) · [watch chronometer](https://appshunter.io/ios/topics/watch-chronometer) · [lepsi watch](https://appshunter.io/ios/topics/lepsi-watch) · [chronolog • watch accuracy](https://appshunter.io/ios/topics/chronolog-watch-accuracy) · [pebble watch](https://appshunter.io/ios/topics/pebble-watch) · [michael kors watch](https://appshunter.io/ios/topics/michael-kors-watch) --- *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 2026-09-06.*