Easy to upgrade. One small quirk, easily adjustment.
I just upgraded from the single lead (that I have had for about 2.5 years now) to this 6-lead option and have been very pleased. I had no issue adding this device to the Kardia app on my iPhone SE 3rd gen. It was a totally seamless process.
I can take both single-lead and 6-lead through this device, and the readouts are clear.
Note that the 6-lead requires you to connect not only your fingers, but also a sensor on the back. There is a little awkwardness finding the right spot if you use your ankle instead of your knee to take a reading, but once you get used to it, it is easier. I am highly sensitive to electronics and feel a little strange sensation when it is taking a reading, but it is not at all painful.
Verified purchase: YesCondition: New