# QN Scale — Smart scale, no cloud

> Smart scale, no cloud (iPhone/iPad app by Pavel DEMIANOV.)

- Source: https://appshunter.io/ios/app/qn-scale/id6800921179 (this page in markdown: same URL + `.md`)
- Developer: [Pavel DEMIANOV](https://appshunter.io/developer/1896680315)
- Category: Health & Fitness, Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 2 MB
- Languages: American English, Russian
- Released: 2026-08-31
- Data updated: 2026-09-10
- User reviews in markdown: https://appshunter.io/ios/app/qn-scale/id6800921179/reviews.md

## What is QN Scale?

QN Scale is an app for bathroom scales that speak the QN protocol. Such scales are sold under the Qingniu, Yolanda and a dozen other names; on the air they usually appear as QN-Scale.

Step on the scale and your weight is already recorded. You find the scale once — after that the app connects on its own while the phone simply lies nearby.

• A chart that follows your finger: pan, pinch and an overview slider under the curve. Press and hold for a marker with the date, the weight and the change since last time.
• 7, 30 and 90 days, or your whole history at once.
• Body composition: the scale measures impedance and the app estimates body fat from it. There is an offset — for when you trust another result more.
• A goal line on the chart and a forecast from the rate of the last thirty days, with the date the goal is reached.
• Apple Health: weight, body fat and BMI go there with your permission, and you can import your history back — duplicates are filtered out.
• The weigh-in reminder arrives only on days when you haven't stepped on the scale yet.
• Russian and English switch inside the app, together with date and number formats.

Your data goes nowhere. The app has no server, no accounts, no analytics and no third-party SDKs — there is not a single network call in its code. Weigh-ins stay on your iPhone, and Bluetooth is used only to talk to the scale.

Body fat is an estimate from impedance, not a measurement: every manufacturer keeps its own closed formula. Watch how the number moves over time rather than its absolute value. The app is not a medical device and is not a substitute for a doctor.


## Version history (last 2 releases)

### 1.0.1 — 2026-09-01

• Body fat is now calculated with an equation derived on people of a similar build and on the same type of scale. Tall users no longer get an inflated number: the previous formula under-counted muscle and added percentage points that were not there.
• The previous formula is still available in Settings → Profile → Formula, together with what each one gives for your latest measurement.
• The chart on the main screen labels peaks and dips with the weight change; the labels can be hidden with the button next to the period switch.
• History restored from Health is recalculated along with everything else and follows the formula setting.

### 1.0 — 2026-08-31

No release notes.

## More apps by Pavel DEMIANOV

- [LumaDICOM: CT & MRI Viewer](https://appshunter.io/ios/app/lumadicom-ct-and-mri-viewer/id6769699150)
- [EUC Logger](https://appshunter.io/ios/app/euc-logger/id6793519994)

All apps by Pavel DEMIANOV: https://appshunter.io/developer/1896680315

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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 2026-09-10.*