I really like my wellue ecg. Their interpretation software isn’t perfect, but it is good enough if you learn the basics of reading the strips. Their software, which you need a computer for, counts your PVC and PACs and tells you a bunch of other data.. I use the Livenpace app on my phone to spot check my palpitations when I exercise. I wear a sports bra over the chest strap, otherwise it gives too much artifact. I’ve used it hard for 4 months, so far so good. I attached a pdf from the Livenpace app.