# Live Diag

> Live Diag (iPhone/iPad app by LEPSI SARL.)

- Source: https://appshunter.io/ios/app/live-diag/id1203676085 (this page in markdown: same URL + `.md`)
- Developer: [LEPSI SARL](https://appshunter.io/developer/590525672)
- Category: Productivity, Entertainment
- Price: Free
- Age rating: 4+
- Requires: iOS 8.0 · 22 MB
- Languages: English, French, German, Japanese, Chinese
- Released: 2017-02-21
- Data updated: 2026-05-19
- User reviews in markdown: https://appshunter.io/ios/app/live-diag/id1203676085/reviews.md

## What is Live Diag?

(ONLY WORKS WHEN CONNECTED TO THE WATCH SCOPE SUPPORT)

WATCH SCOPE, THE EXCLUSIVE SOLUTION FOR A FULL CHECK UP OF YOUR TIMEPIECES.

The Watch Scope can measure the performances of your watch (rate variation, amplitude, beat error) in just a few seconds. Simple, elegant, compact, it is the first ever- developed instrument with such exceptional measurement accuracy.

SMART USER

A smart-user instrument for watch measurement. Connect the support to your touchpad, click on start, and the Watch Scope will take care of everything. Absolutely user-friendly!

HIGHEST MEASUREMENT ACCURACY

After calibrating your touchpad against atomic clocks, the Watch Scope will measure the accuracy rate of your watch with a resolution of 0.1 s/d.

The accuracy of its measurement meets the highest quality requirements of the professional watchmakers.

SMART

You have several watches, the Watch Scope can take care of your full collection and records all your measurements. You will thus be able to detect the deviation of your watches and decide when it is time for one to be serviced.

DIMENSIONS 73x60x80mm

CONNECTIVITY Jack 3,5mm (No separate mains supply)

MEASURING RANGE
Rate variation: -200 s/d to +200 s/d (resolution 0,1 s/d) 
Amplitude 80° to 360° (resolution 1°) 
Beat error 0 to 10 ms (resolution 0,1 ms)


## Version history (last 1 release)

### 3.71 — 2019-09-26

improved stability of the app

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## More apps by LEPSI SARL

- [LEPSI - Watch Analyzer](https://appshunter.io/ios/app/lepsi-watch-analyzer/id905026767)
- [LEPSI - Watch Scope](https://appshunter.io/ios/app/lepsi-watch-scope/id994955418)
- [LEPSI - Watch PRO](https://appshunter.io/ios/app/lepsi-watch-pro/id1039889250)
- [LEPSI - Watch MAGNETISM](https://appshunter.io/ios/app/lepsi-watch-magnetism/id1080183882)
- [Analyzer Vacheron](https://appshunter.io/ios/app/analyzer-vacheron/id1438226472)

All apps by LEPSI SARL: https://appshunter.io/developer/590525672

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*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 2026-05-19.*