A tiny, US$900 wearable device being developed by an Indian billionaire entrepreneur and showcased by some of the country's top sportspersons has sparked criticism from doctors who say its claims of tracking blood flow to the brain are exaggerated.
The Temple device is less than 2.54 cm wide and weighs under two grammes. It sticks to the side of the head between the forehead and the ear, or the temple area.
Promotional materials for the device, developed by Deepinder Goyal, say that its BrainFlow feature shows how well the brain is being supplied with blood in real time and its Entropy feature can detect how hard the body works to shed heat.
It can also measure thermal, immune, digestive, cognitive and emotional readings that help to transform how a person regulates their health, they say.
