the kenko ring.
2.9 grams of titanium that reads your hormones and all five stages of your sleep, every night. no screen, no buttons, and nothing for you to interpret.
- free sizing kit first
- titanium, three finishes
- 7-day battery
5 stagesof sleep, every night
7 dayson one charge
2.9 gof titanium
super platinumbrushed, cool toned
what it reads
four sensors. read together.
hormone rhythm
your monthly curve, modelled nightly from skin temperature. it places your cycle phase.
0.01 °Cfine enough to see the shift
heart rate + hrv
recovery, read all night, when the signal is cleanest.
every 5 minovernight, so one hour cannot skew it
five-stage sleep
awake, rem, light, core and deep. others guess; kenko classifies.
5 stagesincluding the two most trackers skip
movement + spo₂
the day, filled in around the night.
24/7continuous, nothing to remember
the ring is half of it
other rings hand you data.
kenko hands you the answer.
7:02 am · from last nighttake it gently today
day 15 of 28a good day to go heavy
design + engineering
thin enough to forget.
built to last.
unibody titaniumone piece, no seams, nothing to catch
hypoallergenic innermedical-grade moulding against the skin
100 m water ratingshower, swim and sleep. it never comes off
on-ring processingclassified on the ring, not in the cloud
bluetooth le 5.3syncs in seconds. no wifi, no cellular
sensing suiteinfrared + red ppg, thermistor, accelerometer
how it ships
fit first.
then the ring.
it has to fit exactly, so the sizing kit ships before the ring does.
- 01join the waitlist
your place in line. we confirm timing with your invite.
- 02size it overnight
all eight sizes, free. wear your best guess to bed.
- 03confirm and it ships
tell the app which one fit. production starts.