This device is a lifesaver! 8 days after purchasing it, I was feeling
awful and suspected I may have gone into AFib like I did once before. KardiaMobile confirmed it and told me that my heart rate was 204, so I went to the ER and got admitted. It is highly accurate and agreed perfectly with my heart monitor in the hospital. The one negative is compatible with very few android device.
It really delivers peace of mind for me and my family.