# JC Timegrapher — A timegrapher in your pocket

> A timegrapher in your pocket (iPhone/iPad app by Peii Liu.)

- Source: https://appshunter.io/ios/app/jc-timegrapher/id6804900088 (this page in markdown: same URL + `.md`)
- Developer: [Peii Liu](https://appshunter.io/developer/6804900090)
- Category: Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 18.0 · 5 MB
- Languages: American English
- Released: 2026-09-03
- Data updated: 2026-09-14
- User reviews in markdown: https://appshunter.io/ios/app/jc-timegrapher/id6804900088/reviews.md

## What is JC Timegrapher?

JC Timegrapher turns your iPhone into a timing machine (timegrapher) for mechanical watches. Rest your watch against the microphone and JC Timegrapher listens to the escapement to measure how well it keeps time — no extra hardware required.

WHAT IT MEASURES
• Rate — how many seconds per day your watch gains or loses
• Beat error — how evenly the tick and tock are spaced
• Amplitude — how far the balance wheel swings

YOUR COLLECTION
Save each watch to build a history of measurements and service records over time. Everything is stored privately on your device.

HOW IT WORKS
JC Timegrapher filters the microphone signal to isolate the escapement's ticks, then measures the interval between beats to derive the rate — refining the estimate continuously as it listens.

FREE & PRO
Measure up to three times a day for free. Upgrade to JC Timegrapher Pro — a one-time purchase — for unlimited measurements and an ad-free experience.

GOOD TO KNOW
JC Timegrapher is a tool for watch enthusiasts, not a professionally calibrated timing machine. Readings depend on your device's microphone and the noise around you, and may differ from a professional timegrapher. Use the results as a helpful reference, not a substitute for inspection by a qualified watchmaker.

TIPS FOR A GOOD READING
• Find a quiet room
• Rest the watch against the microphone
• Hold still for 10–30 seconds while the reading settles

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| JC Timegrapher Pro | $4.99 | one-time |



## Version history (last 1 release)

### 1.0 — 2026-09-03

No release notes.

## Apps similar to JC Timegrapher

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Timegrapher Advanced](https://appshunter.io/ios/app/timegrapher-advanced/id6792065344) | 5.0 (1) | Free | Utilities |
| [Anglage: Watch Timegrapher](https://appshunter.io/ios/app/anglage-watch-timegrapher/id6797282793) | — | Free | Utilities |
| [FastestPass - Password Manager](https://appshunter.io/ios/app/fastestpass-password-manager/id6740856899) | — | Free | Utilities |
| [Chronograde: Watch Accuracy](https://appshunter.io/ios/app/chronograde-watch-accuracy/id6774091390) | — | Free | Utilities |
| [Ratewell: Watch Timegrapher](https://appshunter.io/ios/app/ratewell-watch-timegrapher/id6782339299) | — | Free | Utilities |
| [Tickscope — Watch Accuracy](https://appshunter.io/ios/app/tickscope-watch-accuracy/id6761128998) | 4.6 (8) | Free | Utilities |

---

*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 2026-09-14.*