Temple aims to track minute fluctuations in cerebral blood flow and oxygenation. (Image credit: X/Deepinder Goyal)Temple, the wearable tech startup led by Zomato and Eternal founder Deepinder Goyal, is set to begin pre-orders for its experimental device soon.In a recent post on X, Goyal said that the Temple wearable is now less than half the size of the version that had been previously depicted. Temple is a health-focused wearable designed to track real-time cerebral blood flow and neurological markers. It is said to be the smallest wearable on the market by volume, as per Goyal.He further said that the company will soon begin taking pre-orders for a limited launch edition of Temple, with shipments expected before the end of 2026. Goyal urged interested users to join Temple’s mailing list for routine updates.“Temple is now less than half the size of what you’ve seen so far. Volumetrically, Temple is now the smallest wearable on the market, and the most powerful,” Goyal wrote on X.Temple is set to arrive at a time when health wearables – from glucose monitors and blood pressure trackers to fitness bands – are reshaping how people monitor their health every day. However, experts have questioned the device’s efficacy and cautioned against investing in unvalidated health technologies. They further highlighted the need for rigorous scientific validation and clinical evidence before such devices are presented as credible medical tools.Temple is now less than half the size of what you’ve seen so far.Volumetrically, Temple is now the smallest wearable on the market, and the most^10 powerful. Living and training with Temple is going to change your life.We will start taking pre-orders for our limited launch… pic.twitter.com/L7tCEW588p— Deepinder Goyal (@deepigoyal) August 21, 2026The inaugural price of the wearable gadget is not known yet. Reports estimate that the company could debut Temple at around Rs 75-80 lakh in order to target more premium customers. Goyal’s post this week comes as the startup looks to initiate another funding round at a $500-million valuation.Earlier this year, Temple generated quite a lot of social media buzz after Goyal appeared on a podcast wearing the small, metallic clip-like gadget that was fixed near his temple.The tiny device is reportedly designed to continuously measure blood flow to the brain and non-invasively, focusing particularly on circulation when a person is upright, moving, or sitting for long durations. The core idea behind the device stems from what Goyal has described as the ‘Gravity Ageing Hypothesis’.Story continues below this adTemple aims to track minute fluctuations in cerebral blood flow and oxygenation, generating real-time data that could help researchers understand how posture, activity and lifestyle affect brain health over time. Goyal has claimed that he has been wearing the device for nearly a year as part of ongoing testing.Also Read | Deepinder Goyal’s temple device: Neurologist debunks it, says not proven or testedThe startup has reportedly partnered with Ethereal Machines and Zetwerk to manufacture its wearable devices.Last month, Temple reportedly launched a partial employee stock option (Esop) buyback at a $375 million valuation. The startup raised $54 million in February this year at a $190 million valuation from Peak XV Partners, Steadview Capital, Dharana Capital, Info Edge Ventures, and more than 80 individual investors.