Temple Wearable To Launch In Six Colours, Says Deepinder Goyal

Deepinder Goyal, founder of Zomato and Eternal, is getting closer to the commercial launch of his new wearable device, Temple. The device has already created interest because, unlike a smartwatch or fitness band, it is designed to be worn on the side of the head, near the temple.

In a recent post on X, Goyal said Temple will be launched in six colours, with pre-orders potentially opening as early as next week. People who have already joined the early-access waitlist are expected to get priority when bookings begin.

Temple To Come In Six Colours

The launch edition of Temple will be available in:

* True Gold
* Rose Gold
* Black Mirror
* Real Jade
* Deep Blue
* Purple Funk

Goyal has not yet announced the final price of the device. However, The Economic Times had earlier reported that Temple could be priced at around Rs 75,000-80,000, placing it in the premium health-tech category.

Key Numbers

* 6 colours planned for the launch
* Rs 75,000-80,000 expected price range
* 60 participants were included in a validation study of Temple’s BrainFlow technology

What Is Temple?

Temple is being developed as a wearable focused on health and brain-related data. Goyal has described the latest version as the smallest wearable in the market by volume and said it is significantly smaller than the earlier version he had shown.

The device is designed to collect information related to brain blood flow, Entropy, cognitive load and stress. Goyal has explained that Entropy is linked to the body’s metabolic and sympathetic demand.

However, these readings should not be seen as a replacement for medical tests or professional neurological evaluation.

How Does Temple Work?

Temple is worn on the side of the head and uses light-based sensing technology to collect signals from tissues and blood vessels. These signals can help detect changes linked to blood flow and oxygenation.

The technology faces a major challenge because light has to pass through several layers of the body, including the skin, scalp, blood vessels, muscle and skull, before reaching deeper areas.

Because of this, medical experts have raised questions about how accurately a temple-based wearable can measure blood flow in deeper parts of the brain.

BrainFlow Technology Behind Temple

Temple is being developed around a system called BrainFlow, which Goyal says is designed to continuously measure blood flow to the brain.

In September, Goyal shared details about the team working on the technology. The team includes Dr Divya Gulati and Dr Sanchit Gupta from the Indian Institute of Science, Dr Yukti Chopra from SISSA Trieste in Italy, and Nitish Kumar from IIT Bombay.

According to Goyal, the team developed and validated what they describe as a continuous wearable measurement of blood flow to the brain.

A validation study involving 60 participants compared Temple BrainFlow with time-domain near-infrared spectroscopy, or TD-NIRS, during three physiological challenges. Goyal said the results showed that BrainFlow could detect changes in brain blood volume beyond the changes seen in the scalp.

The study has been released as a preprint and submitted for peer review. Goyal has also encouraged independent researchers to test and replicate the findings.

A New Direction For Deepinder Goyal

Temple is one of Deepinder Goyal’s biggest projects outside his work with Zomato and Eternal. The project combines wearable technology, health data and research around the human brain.

Goyal has previously spoken about the broader goal of exploring technology that could help people live healthier and potentially longer lives.

With six launch colours, expected pre-orders and a premium price point, Temple is now moving closer to becoming a consumer product. The bigger question will be how the technology performs in real-world use and how independently validated its health measurements become.

For now, Temple is shaping up as an interesting new entry in the growing wearable and health-tech space.