Measuring blood pressure with the iHealth Sense must be done on the left wrist due to the internal position of the pressure sensor.
*credit to Sylvain of iHealth Labs EU
https://helpcenter.ihealthlabs.eu/hc/en-gb/articles/115003895885-iHealth-Sense-BP7-Which-wrist-do-I-have-to-take-my-blood-pressure-on-