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676 models available. Showing nine - search to narrow the list.

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Lowest recorded store prices take priority over announced or launch prices, within the selected source market. Currencies use the dated EUR reference rates. Deposits and recurring charges are excluded from price order; missing prices stay last. Original price records remain visible.

The differences that matter

Circular Ring Pro

Sleep/activity monitoring with vibration feedback

Battery / power
Non-replaceable 24-31 mAh Li-ion ↗

Keep in mind Wellness signals and app-derived sleep/activity scores are not a medical diagnosis. Fit, firmware and personal physiology affect readings.

Oura Ring Gen1

Original sleep and daily-movement tracking

Keep in mind Wellness signals and app-derived sleep/activity scores are not a medical diagnosis. Fit, firmware and personal physiology affect readings.

Published specifications and documented constraints. See the full comparison below for prices and sources.

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Circular Ring Pro versus Oura Ring Gen1
Smart ringsAdd a model
Circular Ring Pro - Original Circular Pro ring, cropped from the left physical device in FITNESATOR’s Circular/Oura Gen3 comparison. Photograph, not a product diagram. Photo/source credit: FITNESATOR / LordOfTheSmartRings.
Smart rings · CircularCircular Ring ProHistorical product
Oura Ring Gen1 - Oura Ring Gen1, the large centre device cropped from Alex Fergus’s original Gen1/Gen2 comparison photograph. Other generations removed from this crop. SmartWearGuide has not tested this device. Photo/source credit: Alex Fergus.
Smart rings · OuraOura Ring Gen1Discontinued
Prices · all markets
Price not verified
0 offer records & sources

No verified price in this audit.

Price not verified
0 offer records & sources

No verified price in this audit.

Designed forSleep/activity monitoring with vibration feedback ↗Original sleep and daily-movement tracking ↗
SensorsInfrared/red/green optical LEDs, 3-axis accelerometer, digital temperature ↗Not verified
Battery / powerNon-replaceable 24-31 mAh Li-ion ↗Not verified
MaterialNot verifiedZirconia ceramic (ZrO2) ↗
Weight5 g ↗Not verified
ControlsMechanical push button and vibration motor ↗Not verified
Form factorOriginal Pro smart ring with interchangeable outer shell ↗First-generation smart ring ↗
Dimensions9 mm wide × 2.8 mm thick ↗Not applicable to this category
MemoryUp to 10 days flash data ↗Not applicable to this category
RuntimeUp to 8 days maker claim ↗Not applicable to this category
ChargingApproximately 45 minutes ↗USB-connected charger with white LED ↗
WirelessBluetooth LE 4.2-5.0 ↗Not applicable to this category
FitUS 6-13 ↗Not applicable to this category
LedsNot applicable to this categoryInfrared LEDs for nighttime biosignals ↗
MotionNot applicable to this category3D accelerometers ↗
TemperatureNot applicable to this categoryNighttime skin-temperature sensor ↗
Inner SurfaceNot applicable to this categoryNon-metallic, nickel-free moulding ↗
AvailabilityExact original Pro manufacturer manual and 2023 firsthand test verified. Original-model new retail stock not established.Oura says Gen1 purchase, customer support and firmware/software updates are no longer supported.
Important context
  • Wellness signals and app-derived sleep/activity scores are not a medical diagnosis. Fit, firmware and personal physiology affect readings.
  • Maker permits light water contact; swimming performance is not claimed.
  • Image crop is the original Circular device at left of the reviewer’s Circular/Oura Gen3 photograph.
  • Wellness signals and app-derived sleep/activity scores are not a medical diagnosis. Fit, firmware and personal physiology affect readings.
  • Photo is the large centre Gen1 unit cropped from the original reviewer’s Gen1/Gen2 comparison.
  • Original 2015 campaign and actual later commercial hardware are not described as a current purchase offer.
Editorial pick & releaseNo editorial ranking recordedNo editorial ranking recorded
EvidenceManufacturer source Checked 2026-10-13Manufacturer source Checked 2026-10-13

Battery claims use different conditions and are not a controlled benchmark. “Not verified” is an evidence gap, not a missing feature. Prices are dated regional snapshots. Deposits, bundles and historical launch prices are labelled. Brightness measurement methods and battery workloads vary by manufacturer.