India, Nov. 3 -- Eternal founder Deepinder Goyal's Temple wearable is now open for pre-booking in India and the company is already making some big claims about its performance. Goyal says the head-worn device can measure heart rate more accurately than several popular wearables, including the Apple Watch Series 12. The claim comes from an internal study shared by the company, which compared Temple with devices from Apple, Garmin, Fitbit, WHOOP and Oura. Unlike a smartwatch that sits on your wrist, Temple attaches to the side of your forehead using adhesive patches. It is designed to track physiological signals from this region, with a particular focus on readings that could offer insights during intense physical activity. But can it reall...