Temple Health Tracker Promises Brain Blood Flow Monitoring, But Its $1,000 Price Raises Questions
A new wearable health device called Temple is trying to stand out in the crowded fitness tracker market with a very different approach. Instead of sitting on the wrist or finger, Temple attaches to the side of the head and claims to measure blood flow near the brain, turning that data into insights about overall health, recovery, performance, and long-term physical condition.
The device became available for worldwide pre-order on November 1, 2026, and it comes with a premium price tag. Temple costs 85,000 rupees in India, €900 in Europe, and is expected to be priced at around $1,000 in the United States.
Unlike traditional wearables such as smartwatches and smart rings, Temple is designed to be worn on the temple using disposable adhesive pads. These pads are said to last two to three days, and the company says replacement pads will be included for life with the purchase of the device.
The main idea behind Temple is that the temple area has strong blood flow, which may allow the device to collect more accurate physiological data. The company believes this placement gives Temple an advantage over conventional wearables, especially when it comes to tracking metrics linked to circulation and physical stress.
Temple includes many familiar health and fitness tracking features. It can monitor heart rate, track sleep, count steps, estimate calories burned, and analyze recovery. However, its biggest selling point is a feature called BrainFlow, which is designed to monitor blood flow to the brain.
The company suggests that BrainFlow could potentially offer insights into cognitive performance or vascular health. However, it is still unclear whether these measurements can provide meaningful medical or wellness information in real-world use. Independent testing will likely be needed before users can know how useful this feature actually is.
Temple also introduces a concept called entropy, which is meant to measure physical strain based on heat dissipation. The device tracks two main entropy-related metrics.
Resting Entropy is designed to reflect the body’s strain while at rest.
Entropy Max is intended to show performance capacity during intense physical activity.
Using these and other measurements, Temple calculates an overall health score called Span. This score is supposed to help users understand long-term changes in their physical condition. However, the company has not fully explained how the Span score is calculated, which may make some buyers cautious.
The device will be available in six colors: True Gold, Rose Gold, Dark Mirror, Deep Blue, Real Jade, and Purple Funk.
Early accuracy claims appear impressive, but they come with important limitations. In an internal study involving 43 participants, Temple reportedly showed an average heart rate deviation of only 1.18 beats per minute. According to the company, this result was better than several competing wearable devices, including leading smartwatches and smart rings.
Still, the study was conducted by the manufacturer, focused only on treadmill exercise, and has not yet been independently verified. That means it remains unknown whether Temple can maintain the same level of accuracy during everyday activities, sleep, stress, outdoor workouts, or irregular movement.
There is also no clear proof yet that Temple’s BrainFlow feature or Span health score can deliver reliable, actionable health insights. While the technology sounds ambitious, buyers may want to wait for third-party reviews and real-world testing before treating its data as more than experimental wellness information.
Temple is backed by Indian entrepreneur Deepinder Goyal, widely known as the founder of food delivery company Zomato. According to the manufacturer, each device is made to order, with shipping expected within three months after purchase.
Despite the buzz around the product, the reaction online has been mixed. Many potential users are skeptical about the high price and are questioning whether Temple offers enough real benefits compared with existing fitness trackers, smartwatches, or smart rings.
At around $1,000, Temple is clearly aimed at early adopters, biohacking enthusiasts, and users willing to pay a premium for experimental health technology. Its head-mounted design, brain blood flow tracking, and overall health scoring system make it one of the more unusual wearables on the market.
However, its success may depend on one major question: can Temple prove that its unique measurements are not only accurate, but genuinely useful? For now, it is an intriguing health gadget with bold claims, a luxury price, and plenty left to prove.
