Deepinder Goyal unveils Temple, calls it ‘humanity’s last personal device’; AI wearable to ship in 2027

Deepinder Goyal, founder of Temple and former Eternal CEO, has unveiled a new wearable device that he describes as “humanity’s last personal device”, pitching it as a screen-free, microphone-free artificial intelligence (AI) companion that can listen to its wearer without recording conversations around them.

Temple 01 is expected to begin shipping in early 2027 with AI and health-tracking features.

Announcing the device on X on Friday, Goyal said Temple emerged from a health wearable project he had been developing as a weekend experiment while he was still leading Eternal. An engineering breakthrough during the project prompted him to return to building full-time and launch Temple, he claimed.


The device uses motion sensors to detect vibrations generated by the wearer's voice and convert them into text, eliminating the need for a conventional microphone. Goyal has described the technology as the world's first “roomdeaf” voice AI companion, saying it can distinguish the wearer's voice from surrounding conversations and noise.

No microphone, no camera: How Temple works

Temple is designed to attach to the wearer's temple using medical-grade adhesive tapes called Grips. It has no microphone, camera or screen and is activated through a double tap. A small vibration confirms when it starts listening, while another signals when the interaction is complete.

Goyal said the device is designed for continuous, multi-day wear, including during showers, swimming, workouts and sleep. It needs to be recharged approximately once a week.

The privacy proposition is central to the product. Goyal said the absence of a microphone means Temple cannot capture conversations happening around its wearer. He also said conversations would be end-to-end encrypted and would never reach an external model company, adding that even Temple's own team would be unable to read them.

The device is intended to let users record thoughts, set reminders, remember personal details, send messages and track everyday activities without reaching for their phones. Users could, for instance, ask it to remember birthdays, medication schedules or details from conversations, or log meals, workouts and health-related observations.

Goyal said Temple is being positioned as a companion rather than an assistant because it will focus on tasks suited to its screen-free form factor and will not handle activities such as shopping.

Health tracking is a key part of Temple's pitch

Beyond AI interactions, Temple is being developed as a health and wellness wearable. Goyal said it already supports tracking metrics including heart rate, heart-rate variability (HRV), sleep and VO2 max.

The company is also working on additional capabilities, including automatic chewing detection for calorie tracking, snoring patterns, sleep positions, jaw-clenching detection, rapid eye movement (REM) tracking and continuous core body temperature monitoring.

Goyal said the device's position near the superficial temporal artery could allow it to capture health and wellness signals that conventional wrist and finger wearables may not be able to detect. He also referred to ongoing research and validation work, including a project called Entropy, without providing further details.

Positioning Temple as a continuing research and development project rather than a finished consumer product, Goyal said the device would keep evolving as new capabilities emerge.

“Temple 01, shipping early 2027 with both AI and health features, is just the start,” he said, adding that he was looking forward to what future iterations, including Temple 20, could become.