These devices can be manually entered on your dashboard here: 
Activities>Manual HRV Entry

  • Oura
  • Garmin
  • Whoop
  • Kubios 
  • HRV (app)
  • Elite HRV (app)
These devices  can be selected for automatic upload on your dashboard here: Profile>Integrations

  • Oura
  • FitBit
  • Freestyle Libre
  • Garmin*
  • Google Fit

*Garmin has a caveat that they do not supply Readiness Score and that it has to be manually entered.  We will be able to save auto-upload data for the future, however.