Let us know how well you like it once you have the chance to get it going. It's the first device of its kind and has been around for at least 5 years. I hope it can compute the QTc, so that you won't have to compute it yourself, which would be a pain in the neck. I once tried doing that off the printout of an ECG. Not something I would call fun.Evidently, the KardiaMobile can also hook up to a tablet. Older ipads which are compatible with the device are available on ebay for around $50 US. I might buy a tablet just so I can used the Kardiamobile app. This device does not require a subscription. If you want your personal sawbones to see results. you save them to memory. Don't know how accurate they are, of course, but I have had an ECG so there is at least one baseline to compare.