The head-worn health-tech device aims to track brain blood flow and physiological strain. Its founder has also claimed better heart-rate accuracy than leading wearables, although the findings are yet to receive independent validation.
Deepinder Goyal’s latest venture into health technology has attracted considerable attention following the opening of pre-orders for Temple, a wearable device priced at ₹85,000. The rush to book the device was significant enough to temporarily crash its official website, turning its launch into one of the latest talking points in India’s consumer technology space.
Pre-orders opened at 9:30 pm on November 1. Within minutes, users began reporting difficulties accessing the website as traffic surged. Goyal acknowledged the issue on X, explaining that the team had underestimated demand and had not enabled automatic server scaling. He later confirmed that the technical team had restored the website.
The incident brought immediate attention to the product, but Temple’s proposition goes beyond the launch-day demand. Unlike conventional smartwatches and fitness bands, the device is designed to be worn on the side of the head, near the temple.
A Different Approach to Health Tracking
Temple is designed to monitor changes in blood flow associated with the brain, alongside physiological indicators intended to help users understand how their bodies respond to physical and mental strain.
The device uses a proprietary technology called BrainFlow to track signals associated with cerebral blood flow. It also introduces an indicator called Entropy, which the company describes as a measure of how hard the body is working to regulate its temperature and manage physiological strain.
Its head-worn placement is a key part of the design. Instead of relying on the wrist or finger, Temple attaches near the side of the forehead using adhesive grips. The company believes this location can offer an advantage when measuring certain physiological signals, particularly during intense physical activity.
Temple Claims Better Heart-Rate Accuracy Than Leading Wearables
The product has drawn further attention after Goyal shared findings from an internal study comparing Temple’s heart-rate tracking performance with five established wearable devices: Apple Watch Series 12, Garmin Forerunner 970, Fitbit Air, WHOOP MG and Oura Ring 5.
According to the company’s findings, Temple recorded lower measurement errors across resting conditions and different exercise intensity zones. The comparison used a Polar H10 chest strap as the reference device, with readings evaluated second by second.
Goyal attributed the reported results to Temple’s adhesive-based design and its placement over a major artery. He also stated that the company had made its research paper and data available and invited independent researchers to replicate the findings.
However, the results should be viewed in context. The study was funded and conducted by Temple, and the published white paper has not been peer-reviewed. Independent validation across a wider range of users, activities and real-world conditions will be important before the company’s accuracy claims can be considered conclusive.
₹85,000 Price Tag and Questions Around Promotion
Temple’s first batch is priced at ₹85,000, placing it firmly in the premium wearable segment. The device is available in six colour options: True Gold, Rose Gold, Black Mirror, Real Jade, Deep Blue and Purple Funk.
The launch has also prompted questions about the product’s early visibility on social media. Several public figures, including badminton player PV Sindhu and cricketer Shubman Gill, have been spotted wearing the device.
Responding to questions about whether influencers and public figures received free units for promotion, Goyal said that everyone who received a beta version had paid for it. Temple’s website also carries a disclaimer stating that it does not pay people to wear or promote the product.
A New Direction for India’s Wearable Technology Market
Temple represents an attempt to move beyond the familiar features of consumer wearables, such as step counting, sleep tracking and basic heart-rate monitoring. Its focus on brain blood flow and physiological strain introduces a different proposition to a market dominated by smartwatches, fitness bands and smart rings.
The initial response suggests considerable curiosity around the product. However, its long-term success will depend on more than launch-day demand. At ₹85,000, consumers will expect reliable measurements, meaningful health insights and clear evidence supporting the technology behind the device.
For now, Temple has made a strong entry into the conversation around premium health-tech wearables. Whether its approach can establish a meaningful place in the market will depend on how its performance holds up under broader independent testing and everyday use.
