Deepinder Goyal's Temple Wearable: Price in India, Pre-Order, Features and Heart-Rate Claims, Explained

Temple, the head-worn tracker from Zomato founder Deepinder Goyal, opened public pre-orders in India on Sunday, 1 November 2026, at 9:30 pm IST. The listed price is Rs 85,000. The device is a pill-shaped wearable that sticks to the side of the head and, the company says, tracks cerebral blood flow.

The launch also came with a website crash, a company heart-rate study aimed at the Apple Watch Series 12, and a clear limit on what Temple is: a wellness product, not a medical device.

The 60-second version

• Price: Rs 85,000 in India, with a lifetime subscription in the early-access listing India Today, NDTV Profit and Storyboard18 described.
• Pre-order: 1 November 2026, 9:30 pm IST, on the Temple app or temple.com. The site crashed under traffic. Goyal said the app still took orders, then that the site was back.
• What it claims to measure: BrainFlow (cerebral blood flow and related oxygenation signals) and an Entropy score from 1 to 250.
• Delivery: made to order, up to three months. Refundable until shipped.
• Heart rate: Temple's own treadmill paper puts its mean absolute error at 1.18 bpm, against 1.94 bpm for the Apple Watch Series 12. Temple paid for the study. It is not peer-reviewed, The Economic Times reported.
• What it is not: a diagnostic device. India Today said it should not replace medical tests or advice.

Price, pre-order and the night the site fell over

India Today's Kazi Nasir, NDTV Profit and Storyboard18 all put the India price at Rs 85,000. Storyboard18, writing on 2 November, said the listed price appears during checkout and that early-access information indicates the price includes a lifetime subscription. India Today described that subscription as app access plus a one-to-one introduction to the device. Livemint, on 25 October, before the window opened, said the company had not officially confirmed the price at that point. The later reports are the ones that describe a live listing.

The India window was 9:30 pm IST on 1 November. Storyboard18 said bookings the same day also covered the United States, the United Kingdom, Central Europe and the Gulf, with Singapore and Australia on 2 November.

Buyers use the Temple app (Apple App Store and Google Play) or temple.com. India Today and NDTV Profit describe the same path: set up an account, choose the wearable and a quantity, enter name and address, and optionally a GSTIN, then pay once the window is open.

temple.com did not stay up. Storyboard18 reported that the site failed shortly after 9:30 pm as traffic spiked. Goyal wrote on X that there was too much traffic, that the team was trying to get on top of it, and that orders were working on the app. He then wrote: "We under-estimated the traffic, and we don't have auto scale. Rookie mistake." Storyboard18 said he later posted: "Website is back up. I hope it holds. Don't rush please." The company has not said how many orders were placed, Storyboard18 reported. India Today said the first batch, Batch 01, is expected to be limited. Livemint, before launch, said the company had not revealed how many units that batch holds.

What you are buying, and when it arrives

Goyal has said delivery takes up to three months from the purchase date, India Today and Livemint reported, because Temple builds each device after the order. Storyboard18 read that as first shipments in early 2027 for people who ordered when the window opened. Refunds can be requested until the device is shipped, India Today, NDTV Profit and Storyboard18 reported.

A second policy is still in the air. On 2 November, in a post NDTV quoted, Goyal wrote that he was tempted to follow Apple and not offer Temple's current 14-day no-questions-asked return in India, and that he would sleep on it. That is a founder thinking aloud. It is not a notice that the 14-day return has ended. The pre-order refund-until-shipped rule is the one the buying guides state as current.

India Today also reported two narrower points from Goyal's posts on X: users will be able to share Temple data with doctors, and the replacement fee in the company's policy applies to lost devices, not to upgrades to a newer model.

What Temple says it measures

The hardware is not a watch. India Today describes a pill-shaped device that attaches between the forehead and the ear. There is no strap. It uses disposable adhesive tapes called Grips. India Today, citing Goyal, said a Grip can last about seven days, and that the company recommends changing it every two to three days if you sweat a lot or spend time in dust. He has said it can be worn while running, swimming and showering, and that it is meant to sit under glasses. Livemint added that it is not for scuba diving.

BrainFlow is the company's name for the optical sensing. India Today said it tracks changes in cerebral blood flow, the movement of blood through the brain, and signals associated with brain oxygenation and cognitive load, so a user can see how the body responds to stress, exercise and recovery. Those are the company's stated uses.

The Entropy score runs from 1 to 250. India Today, Livemint and NDTV Profit describe it as a reading of physiological strain, which sleep, exercise, stress and caffeine can move.

Colours, as India Today, Livemint, NDTV and NDTV Profit listed them: True Gold, Rose Gold, Black Mirror, Real Jade, Deep Blue and Purple Funk. Real Jade, Deep Blue and Purple Funk are the limited finishes.

There is a separate, earlier study of the brain-flow claim. Gadgets360, in a report updated 8 September 2026, said Temple compared a Brain Flow Index with transcranial Doppler readings of middle cerebral artery velocity in 23 healthy adults, during cycling and during a stand-to-lie posture change. Gadgets360 said the study, submitted for peer review, reported heart-rate tracking during cycle exercise with a mean absolute percentage error of about 4 percent, and "strong" temporal agreement with the Doppler trends. The same report quoted the paper's own limit: a strong association does not conclusively prove that the wearable is accurately measuring brain blood flow, and Temple should not be treated as a replacement for the clinical Doppler device.

India Today's pre-order guide is direct on the product category. Temple is for wellness and research, not medical diagnosis, and it should not replace medical tests or advice. NDTV added that doctors and health experts have said it cannot replace clinical investigations.

The Apple Watch claim, in the company's own numbers

On 1 November, Goyal wrote on X that "Temple is the most accurate HR tracker compared to all flagship wearables, even in Zone 4 & 5," NDTV reported, and linked a study. The paper is on Temple's own site: "Temple vs. five flagship wearables: a heart rate accuracy study." It is labelled a white paper based on an internal study. This desk read it.

What the paper says:

• 43 healthy adults (9 women, 34 men), ages 20-35, walked and ran a graded treadmill in an indoor lab in Gurugram in October 2026. Sessions averaged 28.6 minutes. The recording pool is 20.5 hours.
• Everyone wore Temple, an Apple Watch Series 12, WHOOP MG, a Garmin Forerunner 970, a Fitbit Air and an Oura Ring 5 at the same time.
• The reference was a Polar H10 ECG chest strap taped to the skin, so the electrodes would not slip. A second Polar H10 was worn buckled, without tape.
• With failure episodes removed (a failure is a reading more than 20 bpm off for 10 seconds or more), mean absolute error was Temple 1.18 bpm (95 percent confidence interval 1.10 to 1.26), Apple Watch Series 12 1.94, Fitbit Air 2.96, WHOOP MG 3.14, Garmin Forerunner 970 3.18, Oura Ring 5 5.21. With those episodes kept, Temple's figure stayed 1.18 bpm.
• In high-intensity Zones 4 and 5, Temple's error was 1.16 bpm. In Zone 5 alone it was 0.95 bpm.
• The 1.94 Apple figure pools two wrist positions. Worn only in the better, higher position, the Apple Watch Series 12 was 1.52 bpm (bottom position 2.39). Even then, the paper says Temple at 1.18 was still the lowest of the optical devices.

The Economic Times reported that Temple funded, ran and analysed the study, that the white paper has not been peer-reviewed, and that it was a single-site Gurugram test with one session per person and treadmill running only. The paper's own limitations section says the same, and adds that cycling, strength training, outdoor running and everyday activity were not tested. Skin tones on the Monk scale covered 1 to 6. Tones 7 to 10 were not in the sample. The reference was a chest-strap ECG, not a 12-lead clinical ECG. The paper also says generative AI assisted the analysis and drafting, and that the team reviewed the analyses and text before publication.

Goyal's 2 November post, as NDTV quoted it, goes further than the headline Apple comparison. He wrote that Temple beat a standard-wear Polar H10 in Zones 4 and 5, and that the team taped one strap because the usual buckle lost contact in sprints. The paper's numbers on the untaped strap are specific: with failure episodes removed its mean absolute error was 0.59 bpm, and with all readings kept it was 2.12 bpm, against Temple's 1.18 bpm either way. The paper says the untaped strap was more than 5 bpm off for 6.4 percent of data points, mostly drops, which it links to electrode contact. On the "all readings kept" comparison, Temple's error is lower. On the "failures removed" comparison, the untaped strap's error is lower. Goyal also wrote: "More independent validations are underway. Skeptics are urged to wait before buying."

NDTV's write-up of the same study paraphrased Temple's peak-exertion error as roughly 1.14 bpm. The white paper's figures for the high zones are 1.16 bpm (Zones 4 and 5) and 0.95 bpm (Zone 5). The paper is the source of the test. Use those.

What to watch next

1. Whether the 14-day India return survives. Goyal said on 2 November he might drop it. He had not announced a decision in the post NDTV quoted.
2. Independent checks of the 1.18 bpm result. The treadmill paper is Temple's. The Economic Times noted it is not peer-reviewed, and the limitations are treadmill-only, young adults, one session.
3. What peer review does to the brain-flow study. Gadgets360 reported that the Doppler comparison was submitted for review, and that the paper itself stops short of saying Temple measures brain blood flow accurately.
4. First deliveries. A 1 November order, on the company's "up to three months" line, points at early 2027. The company has not published an order count.

Temple is on sale in India at Rs 85,000, made after you pay, and refundable until it ships. The heart-rate lead over the Apple Watch Series 12 is a result from Temple's own treadmill study. The brain-flow promise is still a company claim with a paper that says the association is not proof.

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Price, pre-order time, Grips, Entropy, colours and the wellness disclaimer are from India Today (1 November 2026), NDTV Profit, Livemint (25 October) and Storyboard18 (2 November). The heart-rate figures are from Temple Private Limited's white paper, "Temple vs. five flagship wearables: a heart rate accuracy study," which this desk read, with The Economic Times on the study's funding and peer-review status, and NDTV on Goyal's 1 and 2 November posts. The brain-flow validation details are from Gadgets360's account of that study, updated 8 September 2026. Order volumes have not been published.