casio brings health tracking to its ring watch seriesAfter miniaturizing its digital watches into finger-sized accessories, Casio expands the concept with its first smart ring.
The CRW-H001 builds on the company’s recent series of functional ring watches by integrating health monitoring, activity tracking, and smartphone notifications into a full-metal wearable.
Unlike Casio’s earlier ring watches, which faithfully reproduced the functions of miniature digital watches, the CRW-H001 introduces biometric sensing alongside digital timekeeping.
Casio’s first smart ring builds on the brand’s miniature ring watch seriesfrom watchmaker to smart ring competitorThe release represents another step in Casio’s evolving approach to wearable devices.
The miniature watch enters a rapidly expanding category of smart rings that prioritize discreet health tracking over the larger screens of smartwatches.
casio brings health tracking to its ring watch series
After miniaturizing its digital watches into finger-sized accessories, Casio expands the concept with its first smart ring. The CRW-H001 builds on the company’s recent series of functional ring watches by integrating health monitoring, activity tracking, and smartphone notifications into a full-metal wearable. Available exclusively in China, the device marks a shift from novelty timepiece to connected wearable, reflecting the growing convergence of watches, jewelry, and personal health technology.
Unlike Casio’s earlier ring watches, which faithfully reproduced the functions of miniature digital watches, the CRW-H001 introduces biometric sensing alongside digital timekeeping. The ring records daily steps, calorie expenditure, and activities including walking, running, and cycling, while also monitoring heart rate, blood oxygen levels, body temperature, sleep, and workout recovery.
all images courtesy of Casio
miniaturizing smartwatch technology into a full-metal ring
Compressing smartwatch functions into a ring-sized form required the company to rethink construction and manufacturing. Casio uses metal injection molding (MIM) to reproduce the complex geometry of its watch cases at a much smaller scale, creating a one-piece metal body that retains the visual language of its digital watches. A vapor-deposited mirror finish gives the engraved lettering a metallic sheen, while miniature electronic components allow the ring to combine a digital display with integrated sensors.
The CRW-H001 also functions as an extension of a connected smartphone. A low-power vibration motor delivers discreet alerts for incoming calls, messages, alarms, and selected health notifications, replacing the glance at a wristwatch with subtle haptic feedback on the finger.
Casio’s first smart ring builds on the brand’s miniature ring watch series
from watchmaker to smart ring competitor
The release represents another step in Casio’s evolving approach to wearable devices. While the company’s previous ring watches celebrated its watchmaking heritage by shrinking classic digital models to one-tenth their original size, the CRW-H001 positions the ring as a practical everyday wearable. The miniature watch enters a rapidly expanding category of smart rings that prioritize discreet health tracking over the larger screens of smartwatches.
The ring connects through Casio’s companion smartphone app and supports iOS, Android, and selected HarmonyOS devices, although some notification functions remain unavailable on newer HarmonyOS versions. It is offered in three fixed sizes—9, 10, and 11—and is currently sold exclusively in China, where after-sales service is also limited.
exploded view reveals the miniature electronic components inside the smart ring
the smart ring is packaged with a dedicated storage box and carrying pouch
the CRW-H001 combines digital timekeeping with health tracking and smartphone connectivity
the smart ring supports activity tracking alongside heart rate and blood oxygen monitoring
biometric sensors are integrated into the inner surface of the ring
project info:
name: CRW-H001 Smart Ring Watch
company: Casio | @casiowatches_official
