The Epic Health app, which is set to undergo clinical trials in the UK in the coming months, is suitable for both Type 1 and 2 diabetics
It works by placing a fingertip over the smartphone camera lens and capturing a series of images that convey information about the user's heart rate, temperature and blood pressure and blood oxygen saturation.
Similar innovations have been developed using laser technology and sensor pads to avoid using needles but most need an accompanying gadget to interpret the results.
It does this by measuring the variation in the patient's pulse which is related to blood glucose concentration.
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"The app uses a simple protocol which prompts the user to take a noninvasive test and this allows us to capture the vital information in a systematic way which produces the most consistent results," Dominic Wood, founder of the app, told the 'Daily Express'.
"The prospect of a non-invasive app that monitors blood glucose levels without a drop of blood and without even an accompanying piece of technology is an exciting one," said Dan Howarth of Diabetes UK.