About the Authors

Vanessa Moll

Roles Writing – original draft, Writing – review & editing

Affiliations Department of Anesthesiology, Emory University School of Medicine, Atlanta, Georgia, United States of America, Institute of Anesthesiology, University Hospital Zurich, Zurich, Switzerland

Edward R. Mariano

Roles Writing – review & editing

Affiliations Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, California, United States of America, Anesthesiology and Perioperative Care Service, Veterans Affairs Palo Alto Health Care System, Palo Alto, California, United States of America

Jamie M. Kitzman

Roles Writing – review & editing

Affiliation Department of Pediatric Anesthesiology, Children’s Healthcare of Atlanta, Emory University School of Medicine, Atlanta, Georgia, United States of America

Vikas N. O'Reilly-Shah

Roles Conceptualization, Data curation, Formal analysis, Methodology, Project administration, Validation, Writing – review & editing

voreill@uw.edu

Affiliation Department of Anesthesiology and Pain Medicine, University of Washington, Seattle, Washington, United States of America

Craig S. Jabaley

Roles Writing – review & editing

Affiliation Department of Anesthesiology, Emory University School of Medicine, Atlanta, Georgia, United States of America

Competing Interests

All authors declare no support from any organization for the submitted work; no financial relationships with any organizations that might have an interest in the submitted work in the previous three years; no other relationships or activities that could appear to have influenced the submitted work. The app was initially released in 2011 by Vikas O'Reilly-Shah with advertising in the free version and a paid companion app to remove the ads. The app intellectual property was transferred to Emory University in 2015 and advertisements were subsequently removed. The companion app to remove ads made freely is available for legacy users not updating to the ad-free version. Following review by the Emory University Research Conflict of Interest Committee, Vikas O'Reilly-Shah has been released from any conflict of interest management plan or oversight. This does not alter our adherence to PLOS ONE policies on sharing data and materials.