In July I bought an Omron Viva to replace my old Omron Karada Scan. I was shocked to discover the enormous difference of the results from the two devices. Since I had also compared with results from a Tanita at a medical clinic which showed almost the exact same results as my Karade my conclusion was that the Viva must be defect.
The body weight was the same on the Karada and the Viva but:
Karada:
Body Fat %: 20,6
Skeletal Muscle: 34,4
Viva:
Body Fat %: 27,5
Skeletal Muscle: 27,7
So I turned to Omron Customer... Support and explained the above, asking them what they thought and how we could solve the issue. They referred the "support ticket" to their Swedish wholesaler (SundMed AB)who couldn't answer any questions but said they would ask Omron. Omron answered that it was very complicated and that the two devices used different technology!! Of course this did not solve my problem.
I sent a new message to them and asked them which of their current devices would give me the most correct results (since the Viva wasn't). I never got any reply and they haven't offered me any solution whatsoever. I will never buy anything from Omron again.