Circul Ring makes a smart ring built for continuous health tracking. The wearable measures blood oxygen, heart rate, heart rate variability and sleep stages, and the readings are described as medical-grade in accuracy. It is certified for continuous blood oxygen monitoring, which places it among wearable health devices such as fitness bands and smartwatches, aimed at people who want around-the-clock data instead of occasional check-ins. Sizing relies on telescopic FreeFit™ technology, which adjusts the fit so the ring stays comfortable through the day without anyone having to guess a size. Data can be viewed without a mandatory monthly subscription fee.
The company serves shoppers in over 100 countries, including the United States, Canada, the UK and EU member states, with shipping free to those destinations; a flat $15 fee applies only in a few specific regions.
Circul Ring also runs a referral program paying a $30 store credit for each friend referred who goes on to buy, and that friend receives a discount code as well. A loyalty program awards points for wellness milestones, new users begin with bonus points, and referrals are another route to store credit. Military members and first responders can generally take 15% off by verifying eligibility through GovX, and joining the email list brings a $10 discount on a first purchase.
