ChatPPG.

Wearable accuracy database

Published validation results for consumer wearables, one row per device, metric and statistic. Every row carries the reference standard, the sample, who funded the study, the DOI and the exact sentence or table cell the number came from.

Download CSVDownload JSONVersion 1.0.0, released 2026-10-17. Licence CC BY 4.0.

Coverage by brand and metric

Number of studies with at least one result. “Maker only” means every result for that brand and metric comes from a study the maker funded, employed authors on or supported, or from a preprint. A dash means we found no published validation.

BrandHeart rate at restHeart rate during exerciseOvernight heart rateHRV (RMSSD)Sleep stages (4-stage)Sleep vs wake (2-stage)Total sleep timeBlood oxygen (SpO2)Atrial fibrillation detectionVO2max estimateEnergy expenditure (calories)Respiratory rateBlood pressureSkin temperature
Apple Watch291243–8436–––
Oura1134674–––2–––
WHOOP1maker only223441–––––––
Garmin13132315–33–––
Fitbit25––33113–41––
Pixel Watch–2––1––––1maker only1maker only–––
Samsung14––1–131–21maker only31maker only
Polar–733111–––3–––
Withings11––11–31–––––
Amazfit–1––––––––––––
Ultrahuman–––––––––1maker only––––
COROS––––––––––––––

Rankings by metric: wearable accuracy leaderboards.

Method

  • Original papers only, taken from the abstract or open full text; every DOI verified on Crossref. Preprints are marked peer_reviewed = false and never ranked.
  • Each value is quoted verbatim from the source; quotes are machine-checked against the source text.
  • Rankings compare rows only with the same metric, the same statistic and a comparable reference standard.
  • industry_funded is true when the paper discloses funding, employment or support from the maker of that device.

Cite this dataset

ChatPPG (2026). Wearable Accuracy Database, version 1.0.0. https://chatppg.com/research/accuracy

@misc{chatppg_accuracy_1_0_0,
  title        = {Wearable Accuracy Database},
  author       = {{ChatPPG}},
  year         = {2026},
  version      = {1.0.0},
  howpublished = {\url{https://chatppg.com/research/accuracy}},
  note         = {Data: https://chatppg.com/research/accuracy.csv. Licence CC BY 4.0}
}

Please also cite the original study for any number you use. Each row links to it by DOI.

Studies (78)