STRYKR
STRYKR Smart Ring – Heart Rate, Oxygen and Sleep Tracker
STRYKR Smart Ring – Heart Rate, Oxygen and Sleep Tracker
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A watch for your finger. This ring measures your heart rate, blood oxygen, steps and sleep, and puts it all in an app that shows how you are doing. No screen, no notifications, no subscription.
Why a ring instead of a watch
You do not feel it while you sleep and it does not get in the way during pull-ups, boxing or lifting. Because there is no screen, the battery lasts days instead of hours. You charge it in the little dock that comes with it.
What you do with it
Check in the morning whether you have actually recovered before you plan a hard session. See whether that late night wrecked your sleep quality. Track your resting heart rate over weeks and watch your fitness build.
Choosing your size
Measure the circumference of your finger with a piece of string or a strip of paper. Size 7 is roughly 17.3 mm across, size 12 roughly 21.4 mm. Stuck between two sizes? Take the larger one, a ring that pinches is a ring you will not wear.
Shipping and delivery
Shipping to the Netherlands, Belgium, Germany and Austria in 12 to 20 working days. See Shipping and delivery or the AI & Tech collection.
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