Electronics · Wearables
Circular
Your health data, your rules, never plugged in
Circular.xyz is an online-only, mid-range brand that sells modular smart rings and companion mobile software. Core SKUs are the Circular Ring and Circular Ring Slim, priced around US $250–300, plus optional in-app premium subscriptions for advanced health analytics. All orders ship direct-to-consumer; no retail partners or marketplaces are listed. The rings pack PPG heart-rate, SpO₂, temperature and accelerometer sensors into 3–4 g titanium shells that are waterproof to 50 m. Battery modules snap on for 8-day runtime without removing the ring, and firmware allows custom haptic alarms, contactless payment and Alexa control. Data syncs to iOS/Android apps that translate metrics into daily “Energy” and “Recovery” scores. Primary buyers are 20-40-year-old fitness enthusiasts, biohackers and tech adopters who want Oura-grade insight in a slimmer, subscription-flexible form. The brand courts quantified-self values: open data export, API access, and frequent OTA feature drops pushed via user forums. Circular competes in the sub-$300 wearables space against fashion-forward fitness bands and premium health rings. It differentiates with swappable batteries that eliminate charging downtime, cross-platform openness, and a price point roughly 30–40 % below flagship competitors while still offering medical-grade sensor sampling rates.
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