Peter Gamma from www.peteramma.org is very impressed about Peter H. Charton’s Respiratory Rate Estimation project: http://peterhcharlton.github.io/RRest/ He currently uses a Garmin Fenix 6 for breath meditation. From Peter H. Charlton, Biomedical Engineer specialising in signal processing for wearables: https://www.linkedin.com/in/peterhcharlton/?originalSubdomain=uk Who worked for the University of Oxford, and has conducted research at King’s College London, and …