Deepinder Goyal calls himself delusional for building Temple wearable, to develop 20 generations

Deepinder Goyal is thinking far beyond the first version of Temple. The entrepreneur wants to keep developing his head-worn wearable over several generations, with an ambition to eventually build as many as 20 versions of the device. Calling it an ambitious project, Goyal said his team is “delusional enough to think we can build this. And we will.” In his latest post on X, Goyal shared more details about what the team is building. Temple is designed to sit against the side of the head, near the temple, and track health-related signals. But its bigger ambition is to become what Goyal calls the world's first “room-deaf” voice AI companion.He revealed that the device has no microphone, camera or screen. Instead, it uses motion sensors to detect vibrations produced by the wearer's voice and convert them into text, allowing users to interact with its AI without picking up their phones or recording conversations happening around them. A double tap activates the device, while small vibrations indicate when it starts and stops listening. Deepinder Goyal unveils Temple, a microphone-free AI wearable, and shares his ambition to build 20 generations of the device. Goyal also outlined several everyday uses for the AI companion, including capturing thoughts and ideas, setting reminders, remembering details from conversations, sending messages and logging daily activities such as meals and workouts. Users could also record health complaints such as headaches and dizziness, allowing Temple to build a long-term record of their health.On the health front, Temple will offer features such as heart rate, HRV, sleep and VO2 max tracking. The team is also working on additional capabilities, including automatic chewing detection, snoring pattern monitoring, sleep-position tracking, jaw-clenching detection, REM sleep tracking and continuous core body temperature monitoring. Goyal believes these signals could offer health insights that conventional wrist and finger wearables may miss. Goyal invited people to join the journey, describing Temple as an ongoing research and development project rather than a conventional product. The first version Temple 01, which is priced at Rs 85,000, is set to ship in early 2027 with AI and health features. His comments come as the wearable has attracted considerable attention online, not all of it positive.Why is Temple facing criticism on X?Temple has become the subject of a public debate after doctors and health experts questioned the science behind its claims. Hepatologist Dr Cyriac Abby Philips, popularly known as The Liver Doc on X, has been among its most vocal critics. The central concern is whether Temple can accurately measure blood flow inside the brain using a sensor placed against the side of the head. Critics argue that detecting changes in blood flow near the skin does not necessarily mean the device can measure cerebral blood flow. Questions have also been raised about the scientific evidence supporting its proposed biological entropy metric.The criticism intensified after Temple opened pre-orders in India at Rs 85,000, with doctors questioning whether the product's claims have been independently validated before consumers are asked to pay for it.What Deepinder Goyal has said in Temple's defenceGoyal responded to the criticism in a lengthy post on X on November 5, addressing doctors directly. Rejecting accusations that Temple is a scam, he said the company had already spent $30 million developing the device, including $20 million from his personal funds.He also pointed to Temple's 14-day, no-questions-asked return policy, arguing that customers would quickly find out if the product did not work as promised. Goyal maintained that the company believes in its research and methods, adding that preprints and independent studies would provide more scientific validation.Goyal also clarified that Temple is a fitness and wellness wearable, not a medical device. He said the company would share clinical validation if any of its metrics were clinically validated.However, his response has not convinced all critics. Philips continued to question the scientific evidence behind the wearable, arguing that investment figures and return policies do not establish whether its brain-related claims are accurate.Goyal, meanwhile, remains confident about the project. He also hinted that some of Temple's most groundbreaking features are yet to be made public, adding that some of them have nothing to do with doctors.- Ends