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Circular Ring 2
Smart ring · $349, no subscription

Circular Ring 2

The most ambitious ring on paper, held back by software.

Best for

140+ biomarkers and on-paper ECG in a no-fee ring

Watch out for

ECG/AFib repeatedly failed in independent testing; ~2-day battery

With Vora

Vora can ingest Circular’s data where it is reliable, filling the coaching gap its app leaves.

The Circular Ring 2 scorecard
Skin Temperature65#11AFib & ECG35#11Cycle Tracking60#13Sleep55#18Steps & Activity42#18VO2 Max30#20HRV55#20Running & GPS8#20Stress55#20Recovery50#21Battery Life40#29
Build a stack around the Circular

It is pre-loaded below. Drag in a second device to see how the combined coverage changes.

Vora · Wearable finder29 devices · 17 signals

Build your stack. Vora runs it.

Drag wearables from the ring into the arena, or tap to add. Combine up to 8, each signal takes the strongest sensor you own, and Vora reconciles them into one plan.

ringOuraRing
watch-squareAppleWatch
bandWHOOPBand
bandFitbitBand
watch-roundGarminWatch
watch-roundSamsungWatch
bandFitbitBand
ringUltrahumanRing
patchDexcomCGM
watch-roundGoogleWatch
watch-roundCOROSWatch
podEight SleepSleep
strapPolarHR strap
ringSamsungRing
ringRingConnRing
ringCircularRing
ringAmazfitRing
watch-roundWithingsWatch
watch-roundSuuntoWatch
watch-roundPolarWatch
watch-roundAmazfitWatch
strapGarminHR strap
patchAbbottCGM
patchLevelsCGM
podWithingsSleep
scaleWithingsScale
scaleInBodyScale
scaleHumeScale
scaleGarminScale
Vora
ringCircular Ring 2
44
Stack coverage / 100

A focused setup. Great at its specialty, lighter everywhere else.

Stack price~$349upfront, selected models
Score signals8/16
Gaps
Running & GPS, VO2 Max, Steps & Activity
  • A single device is simplest to live with. Vora squeezes the most out of whatever it captures.
Run this stack with Vora
FAQ
What is the Circular Ring 2 best for?
The Circular Ring 2 is a smart ring best for 140+ biomarkers and on-paper ecg in a no-fee ring. In our scoring it is strongest at temperature, AFib / ECG, cycle.
What are the downsides of the Circular Ring 2?
The main trade-off: ecg/afib repeatedly failed in independent testing; ~2-day battery. That is exactly why many people pair it with a second device so each tracker does what it is best at.
Does Vora work with the Circular Ring 2?
Vora can ingest Circular’s data where it is reliable, filling the coaching gap its app leaves. You keep using Circular's own app to manage the device. Vora sits above it as the coaching layer that acts on the data.
Keep exploring
Best for VO2 maxBest for HRVBest for sleepBest for recoveryBest for runningBest for stepsBest for glucoseBest for stressBest for cycleBest for temperatureBest for AFib / ECGBest for battery
ringOura RingringUltrahuman Ring AIRringSamsung Galaxy RingringRingConnringAmazfit Helio Ringwatch-squareApple Watchwatch-roundGalaxy Watchwatch-roundGoogle Pixel Watchwatch-roundWithings ScanWatchwatch-roundGarminwatch-roundCOROSwatch-roundSuuntowatch-roundPolarwatch-roundAmazfitbandWHOOPbandFitbitbandFitbit AirstrapPolar H10strapGarmin HRMpatchDexcom (Stelo / G7)patchAbbott Lingo / LibrepatchLevelspodEight SleeppodWithings SleepscaleWithings Body ScanscaleInBodyscaleHume Body PodscaleGarmin Index S2

Keep your wearable. Add a coach that acts on the data.

Vora works with Oura, WHOOP, Garmin, Apple Health, Fitbit, Samsung Health, Eight Sleep, CGMs and hundreds more, turning whatever you wear into workouts, nutrition, recovery and a daily plan.

Download Vora