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Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Clear out junk files and repair common Windows errorsFree Scan →Scan for outdated or missing drivers - takes under a minuteDriver Scan →Temple is a forthcoming wearable that sits against the side of the forehead near the temple. Its developer, Temple Private Limited, says it is designed to track a measure called “Brain Flow,” described by founder Deepinder Goyal as a proxy for cerebral blood flow. Goyal’s larger idea is that circulation may help explain aspects of ageing—but neither the device’s health interpretations nor that ageing hypothesis has been established by the evidence reported so far.
What Temple is designed to measure
Temple is not a conventional wrist-based activity tracker. It is worn at the temple, and Goyal says its “Brain Flow” measure is intended to show how a cerebral blood-flow proxy changes during everyday life. Business Standard reported that he wants to observe it in connection with aerobic exercise, sleep, meditation, cold exposure, prolonged sitting and dehydration. These are the company’s intended uses and interpretations, not independently verified measures of brain blood flow or proof that changing a reading improves health. Business Standard, October 5, 2026.
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The company has also described an “Entropy” metric. Goyal characterizes it as a measure of the body’s parasympathetic state and says it changes with sleep, stress, exercise, caffeine and meditation. India Today reported that independent scientists had not validated the proposed biomarker when it covered the product in July 2026. It should therefore be understood as a company-proposed metric, not a clinically established biomarker. India Today, July 15, 2026.
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How the healthy-ageing idea fits in
Goyal connects Temple to what he calls the “Gravity Ageing Hypothesis”: the idea that gravity’s effects on circulation may be relevant to ageing and cognitive decline. That is a hypothesis motivating the project, not a settled scientific explanation of ageing. The existence of a wearable that records a signal does not establish that the signal causes, predicts or prevents age-related decline. The Indian Express, August 2026.
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Goyal told India Today that Temple would launch as a wellness device and said features requiring medical approval would go through regulatory approvals later. A wellness label describes the product’s stated positioning; it does not validate a health claim. The Indian Express also reported experts’ calls for rigorous scientific validation and clinical evidence before health technologies are treated as credible medical tools. India Today, July 15, 2026; The Indian Express, August 2026.
What is known about the device—and what is not
Business Standard reported that Temple attaches with single-use adhesive pads called “Grips.” Goyal said the adhesive was designed to stay in place during running, jumping, swimming, showering and sauna use. The report also attributed an estimate of around seven days of battery life to Goyal and said Temple recommends replacing the Grip every two to three days. These are reported product claims, not independent test results or a hands-on assessment.
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The sources reviewed do not provide enough detail to assess Temple’s technical sensing method, measurement accuracy or performance under different conditions. They also do not give study protocols, results or independent validation data. Business Standard reported plans for peer-reviewed studies and a collaboration with the Sri Sri Institute for Advanced Research to study meditation practices and Entropy, but did not provide study results. A planned study is not evidence of a validated measure. Business Standard, October 5, 2026; India Today, July 15, 2026.
Preorders, shipment timing and price
Availability reports have changed over time, and none establishes that general consumer sales have begun. Business Today reported on May 5, 2026, that the first 100 devices were ready for shipment to selected founding users. Goyal’s August 21 post said preorders would begin soon and shipment was planned before year-end. As of Business Standard’s October 5, 2026 report, limited-edition preorders were expected soon, with shipments planned before the end of 2026. These are announcements and plans, not confirmation of broad retail availability. Business Today, May 5, 2026; Deepinder Goyal’s LinkedIn post, August 21, 2026; Business Standard, October 5, 2026.
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No official launch price was confirmed in the October report. July coverage cited a likely estimate of US$1,000, while a Times of India report cited an indicative ₹80,000 price from people familiar with the product. Those figures are media-reported estimates, not confirmed prices; the available reports do not establish a final price or explain how the estimates relate to each other. India Today, July 15, 2026.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How Temple differs from a typical fitness wearable
Most familiar fitness wearables are worn on the wrist and focus on signals or activities captured there. Temple’s stated point of difference is its forehead-side placement and its proposed cerebral blood-flow proxy. That makes its central question different from a step count or workout log—but it does not, by itself, make the readings more clinically meaningful.
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| Question | Temple, based on reported information | What that means for a buyer |
|---|---|---|
| Where is it worn? | At the side of the forehead near the temple. | It uses a different placement from a wrist tracker; comfort and signal quality in everyday use are not established by the reports. |
| What does it aim to measure? | A company-described “Brain Flow” proxy for cerebral blood flow, plus a proposed “Entropy” metric. | The measures and health interpretations need independent validation before they can support medical conclusions. |
| What evidence is reported? | Plans for peer-reviewed studies and a reported meditation-research collaboration; study protocols, results and independent validation data are not supplied. | Research plans should not be mistaken for published findings. |
| How is it attached and powered? | Single-use adhesive Grips; around seven days of battery life is attributed to Goyal by Business Standard. | The attachment and battery details are reported product claims, not independently tested results. |
| Is there a confirmed price or broad retail availability? | No official price was confirmed in the October 2026 report; preorder and shipping announcements do not establish general consumer sales. | Wait for confirmed ordering, shipping and pricing details before making a purchase decision. |
Goyal described a redesign in an August 21, 2026 LinkedIn post, saying the device was “less than half the size” shown previously and calling it the smallest wearable on the market by volume and “the most^10 powerful.” Those size and performance superlatives are his claims, not independently verified comparisons. Deepinder Goyal’s LinkedIn post, August 21, 2026.
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