Which device is more accurate, the wrist model or the upper arm model?

The accuracy of both devices is nearly on the same level. But everyone has a different nature of blood vessels and so it also differs which device is more accurate for which patient. We recommend you to compare and try both devices to decide which is best suited for yourself. If both devices behave the same way, we recommend to purchase the upper arm model because the measurement's status is further developed in this state.