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Wearable guides

Ultrahuman Ring PRO: Finger PPG

The photograph is an Ultrahuman Ring PRO in bionic gold. Ultrahuman also sells Ring AIR. Ultrahuman lists up to 15 days of battery for Ring PRO, 4–6 days for Ring AIR, and 100 m water resistance.

Photograph of an Ultrahuman Ring PRO in bionic gold, resting on fabric.
Ultrahuman Ring PRO in bionic gold: product photograph from Ultrahuman. The comparison also names Ring AIR; this photograph is Ring PRO.

Ultrahuman lists Ring PRO battery life of up to 15 days and Ring AIR battery life of 4–6 days, and 100 m water resistance for the rings (Ultrahuman: Ring PRO vs AIR; Ultrahuman: Ring AIR FAQs). Ring AIR is listed at 2.4–3.6 g depending on size, with PPG (green, red and infrared LEDs), skin temperature and 6-axis motion (Ultrahuman: Ring AIR). Ultrahuman lists no mandatory data subscription.

The photograph is Ring PRO in bionic gold. It is not Ring AIR. This guide does not add accuracy figures. The evidence table shows only rows already in the ChatPPG accuracy database.

Sourced figures

Every number in this guide comes from the source linked beside it. Each study result applies to that study's devices, participants and protocol only.

  • Ultrahuman manufacturer specifications: Ring PRO battery up to 15 days; Ring AIR battery 4–6 days.

    Ultrahuman: Ring PRO vs AIR

  • Ultrahuman Ring AIR manufacturer specifications: PPG with green, red and infrared LEDs, skin temperature and 6-axis motion; weight 2.4–3.6 g depending on size.

    Ultrahuman: Ring AIR

  • Ultrahuman lists 100 m water resistance and no mandatory data subscription.

    Ultrahuman: Ring AIR FAQs

What published studies show

Results quoted from 1 published validation study, each against a clinical reference. A result applies to the model and protocol tested, not to every model the brand sells. From the wearable accuracy database (v1.0.0).

No independent validation of Ultrahuman. Every result we found for Ultrahuman comes from a study its maker funded or wrote, or from a preprint that has not been peer reviewed.

VO2max estimate1 study

  • Ultrahuman Ring AIRMAE 4.68 mL/kg/min (r 0.79)

    Mean absolute error · vs Indirect calorimetry · n = 101, Single-site CPET cohort; model developed on 85, tested on 16

    Dhawale et al. (2026) Preprint · maker authored

VO2max accuracy across devices →

Ultrahuman Ring PRO: Finger PPG Comparisons

Ultrahuman Ring vs Oura Ring: Specs and Published Evidence

Ultrahuman Ring and Oura Ring are both screenless rings that track sleep, heart rate and HRV from the finger. The difference that matters for accuracy is evidence. Oura rings have been tested against polysomnography and ECG in many peer-reviewed studies, several of them independent. We found no peer-reviewed study that tested an Ultrahuman Ring against a clinical reference. The only Ultrahuman validation is a 2026 medRxiv preprint written by Ultrahuman staff on its VO2max estimate, and no study has tested both rings together. So this page does not rank them on accuracy.

View Comparison →
View all comparisons →

Frequently Asked Questions

Is the photograph Ring AIR?

No. It is an Ultrahuman Ring PRO in bionic gold. The comparison with Oura also names Ring AIR.

Does this page add a new accuracy figure?

No. The evidence table shows rows already in the accuracy database.

Sources

  1. Ultrahuman. Ultrahuman Ring PRO vs Ring AIR
  2. Ultrahuman. Ultrahuman Ring AIR technical specifications
  3. Ultrahuman. Ultrahuman Ring AIR FAQs

Compare with Other Wearables

Oura Ring: Finger PPG Sensor and AccuracyWHOOP 4.0: PPG Sensor and Recovery ScienceSensor Bio V2: B2B Raw PPG Platform