Archive · 6 Oct 2026
Deepinder Goyal’s Temple Wearable Tracks Brain Blood-Flow Signals
Temple is a small device that sticks to the side of your head.
Its maker says it can track signals related to blood moving through the brain.
It also gives a score called Entropy, meant to show how hard the body is working.
The company says these readings may change with things like exercise, sleep, posture, stress, or caffeine.
Early studies compared Temple’s readings with other scientific tools.
But the studies do not prove that Temple can diagnose illnesses.
The company says it is a wellness product, not a medical device.
It is not on general sale yet, and its expected price has not been officially confirmed.
The company is aiming to ship it before the end of 2026.
Temple is a wearable designed to attach to the side of the forehead and continuously measure signals linked to blood flow in the brain.
Its BrainFlow reading is described by the company as a proxy for cerebral blood flow, while Entropy is intended to reflect the body’s overall physiological demand.
Temple cites early studies comparing its readings with established research instruments, but those studies do not show that it can diagnose disease or replace clinical equipment.
The device uses adhesive Grips, is expected in six launch colours, and is not yet broadly available.
The final price has not been announced; media reports put it at about Rs 75,000–80,000, with shipping targeted before the end of 2026.
- Who
- Deepinder Goyal’s health-tech company, Temple Private Limited, is developing the Temple wearable.
- What
- A wearable that measures signals linked to cerebral blood flow and provides an Entropy score.
- When
- Pre-orders may open soon; shipping is targeted for before the end of 2026.
- Where
- The device is worn on the side of the forehead, over the temple.
- Why
- The company aims to continuously track physiological signals from the head during everyday activities.
Potential of the measurements
Limits and cautions
What BrainFlow may offer
Potential of the measurements
Temple says continuous measurements from the temple could show how brain blood-flow-related signals change with daily activities such as exercise, sleep, and posture.
Limits and cautions
The cited studies are early validation research; they do not establish that the device can diagnose conditions or replace clinical measurement tools.
How to interpret the readings
Potential of the measurements
The company presents BrainFlow and Entropy as ways to track physiological changes over time.
Limits and cautions
Temple says it is a wellness product, and its readings should not be treated as medical measurements or a substitute for professional assessment.
- Main reading
- BrainFlow, described by Temple as a proxy for cerebral blood flow
- Additional metric
- Entropy, intended to reflect the body’s real-time physiological demand
- Attachment
- Adhesive Grips that the company says can last several days
- Launch colours
- Six
- Reported price
- About Rs 75,000–80,000; the final retail price has not been announced
- Availability
- Early-access registrations are being collected; waitlisted people are expected to get priority for pre-orders
- Expected shipping
- Before the end of 2026
- Medical status
- Temple says it is not a medical device and its readings are not a substitute for professional medical assessment