Connecting Samsung to YuMuuv
Samsung (before 4th gen.) with Android phone
Connect with Google Fit and HealthSync (Samsung Health > HealthSync > Google Fit > YuMuuv)
Connecting your Samsung to YuMuuv is a bit more complicated than usual, as Samsung itself does not encourage data sharing these days. To get data from Samsung Health to YuMuuv, you need to connect it to Google Fit first. Then you need to download an app called HealthSync and connect it. Without HealthSync, you can't get your data from Samsung device to YuMuuv until you do not carry your phone with you all day long and measure steps automatically to Google Fit with that. And now you are ready to connect yourself to YuMuuv.
Samsung with iPhone
However, if you're using a Samsung watch and an Apple phone, this system does not work - HealthSync can not be downloaded to iOS. In this case, you just need to connect Apple Health to YuMuuv.
Samsung (from 4th gen.) with Android phone
Connect with Google Fit (Samsung Health > Google Fit > YuMuuv)
If you have a device from the 4th generation onwards (since Samsung watch 4), you can connect your Samsung Health to Google Fit without HealthSync.