Founder and CEO Deepinder Goyal’s Temple device — reportedly designed to measure blood flow to the brain — has sparked curiosity once again after Goyal shared a minimalist promotional image with the word “Temple” across the top and the tagline: “The most important wearable ever made.” The post ends with “Coming soon” without revealing any other details about the product.
The image shows a close-up of a person’s face with a small white device placed near the temple area of the forehead. Goyal captioned the post, “A wearable like no other. Follow @temple to know when the waiting list opens.”
The announcement quickly drew reactions from social media users, many of whom expressed excitement. “I’m excited about all this but how did you even get that username bro,” one user commented.
“Temple by @deepigoyal reflects grace in its simplest form. A timeless everyday accessory,” wrote another.
“Whoever makes this knows what it takes to build something,” commented a third user.
“The world is in a rush to build an LLM but this man has other goals (this can change everything if he can take his word for it),” said another.
“The temple – the body is the temple and the individual soul is the eternal God,” commented one user.
What does Temple do?
The tiny device is said to be designed to continuously monitor blood flow to the brain in a non-invasive manner, with a particular focus on circulation when a person is upright, moving or sitting for extended periods of time. The concept of the device is based on what Goyal described as the “gravitational aging hypothesis”.
According to this hypothesis, the long-term effects of gravity over decades can reduce effective blood circulation in the brain, which can affect aging, cognitive decline, and overall neurological health. Temple’s goal is to track subtle changes in cerebral blood flow and oxygenation, creating real-time data that could help researchers examine how posture, activity and lifestyle affect brain health over time.
Goyal said he has been wearing the device for almost a year as part of ongoing testing. The device is not currently available for sale and is positioned as a research prototype rather than a medical product.
Is Temple a medical device?
Several reports indicate that Temple has not yet received regulatory approval as a medical device. It has not been certified for the diagnosis, prevention or treatment of any disease and is therefore not currently considered a medical device.
Doctors and neuroscientists cited in these reports reportedly note that a comprehensive or reliable assessment of brain health cannot be achieved by measuring blood flow in the temple area alone. Experts also point out that wearable sensors cannot replace advanced imaging techniques such as MRIs or PET scans, which are usually required to accurately assess brain blood flow.
