In general BP monitors around the upper arm are more accurate than those around the wrist, although the latter are certainly more convenient to wear and easier to access.
It might be worth checking your matching against a reading from one taken at a clinic, so that you know if there is a degree of error. For the arm machines, please remember to use the correct size cuff - this depends on your arm size.
Hope this helps.
Bw
Dr Dinesh
