QN Scale

Smart scale, no cloud

Only for iPhone

Free · Designed for iPhone. Not verified for macOS.

iPhone

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.

Ratings & Reviews

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• 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.

Version 1.0.1

The developer, Pavel DEMIANOV, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    • Pavel DEMIANOV
    Size
    • 1.7 MB
    Category
    • Health & Fitness
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • Mac
      Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    • English and Russian
    Age Rating
    9+
    Copyright
    • © 2026 Pavel Demianov
  • Developer Website
  • Privacy Policy

    • More by Pavel DEMIANOV

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