# Tempochron: Watch Timegrapher

> Measure Rate & Beat Error

Canonical page: [https://chrome-stats.com/d/id6767587425](https://chrome-stats.com/d/id6767587425)

## Overview

- **ID:** `id6767587425`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Jan Sokol
- **Category:** Utilities
- **Version:** 1.11
- **Last updated:** 2026-08-24
- **First published:** 2026-05-15
- **Size:** 5.97 MB
- **Data as of:** 2026-09-23
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/tempochron-watch-timegrapher/id6767587425)
- **Website:** [https://cognerva.com/tempochron/](https://cognerva.com/tempochron/)
- **Privacy policy:** [https://cognerva.com/tempochron/privacy/](https://cognerva.com/tempochron/privacy/)

## Description

Measure rate and beat error with your iPhone—or compare two dial photos with the camera. Keep care history and readings with each watch.

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.

## Rankings

- #1,270,786 — Overall

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- [Timegrapher X](https://chrome-stats.com/d/id1516161361) — 4.20 / 5
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- [AccuBeat](https://chrome-stats.com/d/id6784609633)
- [Watch Tuner Timegrapher](https://chrome-stats.com/d/id991367080) — 3.80 / 5
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Source: [Chrome-Stats](https://chrome-stats.com/d/id6767587425)