Accuracy Of Measurement

The accuracy of the measurement depends on the iPhone model, and the time it takes to complete the measurement. A visible and audible timer indicates when the accuracy starts to deteriorate.

For even greater accuracy, you can repeat the measurement a number of times and Moasure displays the average measurement.

The newer the smartphone model you’re using, the more inherently accurate Moasure’s measurements will be, as each new generation of motion sensors improves on the previous one.

The iPhone 7 and 7 plus models are the most accurate, and the iPhone 6S and SE models are more accurate than the iPhone 5S.

No matter which model you’re using, there are steps you can take to ensure you get the greatest accuracy from Moasure. These include:

Carrying out the measurements quickly. With Moasure, accuracy is a result of how much time the measurement takes, not how long the measurement is. Don’t be tempted to move the phone slowly; the quicker you move your phone from ‘A’ to ‘B’, the better. After a few measurements, you’ll get a feel for the best way to hold and move your phone.

Split the measurement up into two or more parts. If your measurement is going to take more than 3 or 4 seconds (3-4m / 10-13’), select the appropriate ‘multi-step’ measuring mode. Momentarily rest your smartphone against a solid object part way along the measurement, and Moasure can then calculate the total measurement distance more accurately.

Keep the phone level during the measurement. It doesn’t matter which way up you hold your phone, but try not to rotate your phone during the measurement. The more you rotate your phone, the less accurate the result will be.

Taking the average of a number of measurements will also increase the accuracy. Taking two or three measurements will typically decrease the tolerance to +/-1%, while five measurements will typically achieve +/-0.5%.

Ensuring confidence in our measurements

Our aim is to ensure Moasure is always the most accurate motion-measure available. We’ve carried out thousands of test measurements covering all the different iPhone models, over different distances and of various durations, with the following results*:

On iPhone 7/7 Plus, single measurement:

  • 67% of measurements within 0.5%
  • 97% of measurements within 1.0%.
  • 100% of measurements within 1.5%.


On iPhone 7/7 Plus, average of 3 measurements:

  • 92% of measurements within 0.5%
  • 100% of measurements within 1.0%.


On iPhone 6/6 Plus, single measurement:

  • 83% of measurements within 1.0%
  • 97% of measurements within 1.5%.
  • 100% of measurements within 2.0%.


On iPhone 6/6 Plus, average of 3 measurements:

  • 72% of measurements within 0.5%
  • 100% of measurements within 1.0%.


*These results are for measurements taking between 2 and 3 seconds to complete. Measurements over a shorter period should be more accurate, whilst longer measurements will be less accurate. When using multi-step measurements, the accuracy is determined by the time period of each measuring step.