I like the EKGraph Portable EKG Monitor I purchased through Amazon. I initially tried a less expensive alternative from a different manufacturer but returned it because it required I use a computer with the latest operating system to download my data. It would have been easier to choose the SonoHeath if it was less expensive to begin with. I look forward to the manufacturer upgrading the software to enable the user to enter their minimum acceptable resting heart rate range so people like me are not frequently warned of possible bradycardia due to a resting heart rate of less than 60 (I'm athletic and take a prescribed beta blocker).