Understanding Measurement Results
Why are my body composition numbers different from the ones I see at my gym, doctor, etc.?
Body composition analysis is an inexact science, regardless of the manufacturer or method of measurement. Because your scale combines the measurements it takes with variables stored in your user profile according to our algorithm, the numbers you see may vary from those you see using other measurement methods – which is completely normal. When you're measuring body composition, it's more important to pay attention to overall trends than the absolute value of a single measurement. (Tracking in the Renpho app helps with that.)
Who should use Athlete Mode?
For the purposes of Athlete Mode for the Renpho Bluetooth Smart Scales, an athlete is defined as someone who consistently works out for approximately 3 times a week for 2 hours. This may also apply to people, who previously worked out frequently for a long period of time but less now. This mode is also suitable for people involved in endurance sports, such as running and cycling.
If you are still wondering whether or not you should use Athlete Mode, don't worry too much about it. There is not an exact moment where you are - or are not - an athlete. Some people will get a slight underestimation on athlete mode and a slight overestimation on standard adult mode, falling into a gray area. In which case, the most important factor to look for in the Renpho Bluetooth Smart Scales is when you are given consistent readings over a period of time. Sticking with the same assessment system will likely yield a better overall picture of a person's health status. Relative changes in value are more meaningful than the absolute value of a single measurement.
Why is Athlete Mode necessary in a Body Fat Scale?
It was found that body fat estimation using bioelectrical impedance analysis (BIA) can overestimate the body fat percentage of adult athletes. The physiological variations of athletes are said to account for the difference in body composition compared to the average person with a moderately active lifestyle. Such variations include higher bone density and hydration levels in athletes. Therefore, to get the most accurate measurement results, adult athletes should turn on Athlete Mode in the Renpho app.
How do I know if my weight is healthy?
Under the app's home section, tap/select a metric to view the healthy range. A brief explanation will pop up.

What is the weight accuracy of my scale?
The Renpho scale has an incremental measurement accuracy range that is based on how much you weigh:
50kgs: ± 0.3kg
100kgs ± 0.4kg
150kgs ± 0.5kg
110lbs: ± 0.66lb
220lbs ± 0.88lb
330lbs ± 1.1lbs
For example, if you weigh 220lbs, the scale is accurate to within ±0.88lbs difference.
Please don’t use the scale if you weigh more than 396 lbs.
How does the scale measure my body fat and other body composition metrics?
Like most household body fat scales, the Renpho Smart Body Composition Scales use the Bio-electrical Impedance Analysis or Bioimpedance Analysis (BIA) Method to assess body compositions. Measuring body fat in relation to lean body mass is an integral part of a health and nutrition evaluations.
This non-invasive test simply involves your feet touching four electrodes on the scale. A low level, imperceptible electrical current is sent through the body. The flow of the current is affected by the amount of water in the body. The device measures how this signal is impeded through different types of tissue. Tissues that contain large amounts of fluid and electrolytes, such as blood, have high conductivity, but fat and bone slow the signal down. As BIA determines the resistance to flow of the current as it passes through the body, it provides estimates of body water from which body fat is calculated using selected algorithms.
This is why the measurements need to be done barefoot, with both the user's feet on the scale touching the metal pads.
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