Comparing Glucose Meter Accuracy

One of the most frequent questions we get from our customers who purchase the iHealth Align Portable Glucometer or the iHealth Smart Wireless Glucometer is: “How accurate are iHealth’s meters compared to other glucose meters on the market?” Unfortunately, there is not a straightforward answer to this question, as no two meters will give you the same readings and a difference of even 20-30 points may be in the range of error. iHealth glucometers meet the most up-to-date FDA regulations and ISO standards, which state that over-the-counter home-use meters must be accurate within +/-15% compared to a formal lab measurement. This means that a person with a glucose level of 100 can read as low as 85 or as high as 115 and still be within the range of accuracy.

Factors that Determine Accuracy

According to the FDA and several clinical studies, many factors can determine the accuracy of your meter, including:

  • the quality of the meter and test strips
  • interfering substances (Vitamin C, Tylenol, etc.)
  • how well you perform the test. For example, you should wash and dry your hands before testing and closely follow the instructions for operating your meter.
  • altitude, temperature, and humidity (High altitude, low and high temperatures, and humidity can cause unpredictable effects on glucose results). Check the meter manual and test strip package insert for more information.
  • store and handle the meter and strips according to manufacturer’s instructions. It is important to store test strip vials closed and to make sure that you are not using expired strips to check your blood sugar.

3 Ways to Ensure Your Meter is Working

Rather than comparing meters to other meters to gauge accuracy, the FDA recommends using the three ways below to ensure that your meter is working properly:

  • Use liquid control solution:
    • every time you open a new container of test strips
    • occasionally as you use the container of test strips
    • if you drop the meter
    • whenever you get unusual results

    To test a liquid control solution, you test a drop of these solutions just like you test a drop of your blood. The value you get should match the value written on the test strip vial label.

  • Use electronic checks. Every time you turn on your meter, it does an electronic check. If it detects a problem it will give you an error code. Refer to the manual or support page to see what the error codes mean and how to fix the problem. If you are unsure if your meter is working properly, please reach out to or 1-855-816-7705.
  • Compare your meter with a blood glucose test performed in a laboratory. Take your meter with you to your next appointment with your health care provider. Ask your provider to watch your testing technique to make sure you are using the meter correctly. Ask your health care provider to have your blood tested with a laboratory method. If the values you obtain on your glucose meter match the laboratory values, then your meter is working well and you are using good technique.

Additional Resources

To learn more about the glucose meter accuracy, we recommend the following informative articles:

We hope this helps! If you have any questions, please reach out to us at We would love to hear your feedback.

October 23, 2017 | Categories: Diabetes, Fitness | Comments Off

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