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The development and validation of reliable cardiovascular monitoring algorithms for these consumer-grade devices requires realistic biosignal data from diverse sets of participants. However, the availability of public consumer-grade smartwatch datasets with synchronized cardiovascular biosignals remains limited, and existing datasets often lack rich demographic diversity in their participant cohorts, potentially leading to biased algorithm development. This paper presents HEART-Watch, a multimodal physiological dataset of synchronized wrist-worn Google Pixel Watch electrocardiogram (ECG), photoplethysmography, and accelerometer signals from a diverse cohort of 40 healthy adults across three physical states \u2013 sitting, standing and walking \u2013 alongside reference chest ECG. Intermittent upper arm blood pressure measurements and concurrent biosignals were collected as an additional biomarker for future research. The motivation, methodology, and initial analyses of results are presented. HEART-Watch is intended to support the development and benchmarking of robust cardiovascular algorithms on consumer-grade smartwatches across diverse populations.<\/jats:p>","DOI":"10.1371\/journal.pdig.0001647","type":"journal-article","created":{"date-parts":[[2026,8,25]],"date-time":"2026-08-25T17:24:41Z","timestamp":1787678681000},"page":"e0001647","update-policy":"https:\/\/doi.org\/10.1371\/journal.pdig.corrections_policy","source":"Crossref","is-referenced-by-count":0,"title":["HEART-Watch: A multimodal physiological dataset from a Google Pixel Watch across different physical states"],"prefix":"10.1371","volume":"5","author":[{"ORCID":"https:\/\/orcid.org\/0009-0009-8792-9050","authenticated-orcid":true,"given":"Jathushan","family":"Kaetheeswaran","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Boyi","family":"Ma","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ali","family":"Abedi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shehroz S.","family":"Khan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6571-2867","authenticated-orcid":true,"given":"Milad","family":"Lankarany","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"340","published-online":{"date-parts":[[2026,8,25]]},"reference":[{"issue":"11","key":"pdig.0001647.ref001","doi-asserted-by":"crossref","first-page":"1001","DOI":"10.1093\/eurjpc\/zwae281","article-title":"Global burden of cardiovascular diseases: projections from 2025 to 2050","volume":"32","author":"B Chong","year":"2025","journal-title":"Eur J Prev Cardiol"},{"issue":"25","key":"pdig.0001647.ref002","doi-asserted-by":"crossref","first-page":"2361","DOI":"10.1016\/j.jacc.2022.11.005","article-title":"The Global Burden of Cardiovascular Diseases and Risk","volume":"80","author":"M Vaduganathan","year":"2022","journal-title":"J Am Coll Cardiol"},{"issue":"5","key":"pdig.0001647.ref003","doi-asserted-by":"crossref","first-page":"466","DOI":"10.3390\/su8050466","article-title":"Sustainable Wearables: Wearable Technology for Enhancing the Quality of Human Life","volume":"8","author":"J Lee","year":"2016","journal-title":"Sustainability"},{"key":"pdig.0001647.ref004","doi-asserted-by":"crossref","first-page":"151111","DOI":"10.1109\/ACCESS.2025.3602893","article-title":"Wrist-Worn Devices for Remote Monitoring of Cardiovascular Disease: A Survey","volume":"13","author":"I Sadiq","year":"2025","journal-title":"IEEE Access"},{"issue":"283","key":"pdig.0001647.ref005","doi-asserted-by":"crossref","DOI":"10.1126\/scitranslmed.aaa3487","article-title":"The emerging field of mobile health","volume":"7","author":"SR Steinhubl","year":"2015","journal-title":"Sci Transl Med"},{"issue":"8","key":"pdig.0001647.ref006","doi-asserted-by":"crossref","first-page":"581","DOI":"10.1038\/s41569-021-00522-7","article-title":"Smart wearable devices in cardiovascular care: where we are and how to move forward","volume":"18","author":"K Bayoumy","year":"2021","journal-title":"Nat Rev Cardiol"},{"issue":"5","key":"pdig.0001647.ref007","doi-asserted-by":"crossref","first-page":"652","DOI":"10.1161\/CIRCRESAHA.122.322389","article-title":"Wearable Devices in Cardiovascular Medicine","volume":"132","author":"A Hughes","year":"2023","journal-title":"Circ Res"},{"key":"pdig.0001647.ref008","unstructured":"Global Market Insights. 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