I was using a Kardia device previously and hated the thing.. it would be finicky at best and any interference screwed the records.. like you could not use a Kardia device near any radio frequency devices and cant even use it while the phone is charging! The Kardia mobile app sucks and requires you to pay $30 per month if you even wanted to save any recordings on your own mobile device.. Then I found SonoHealth!! What breath of fresh air!! The device does not require a phone to make recordings and you can record EKG's whenever and wherever you wanted, right on the device!! I really like the fact that I can record as much as i like and store as much as I like without being forced into paying a subscription.. The SonoHealth also supports many more diagnostic features and you can record multi-lead locations, like chest, ankle, etc.. I have had to deal with the app customer support once and I was blown away at the speed at which I was helped and the level of professional courtesy.. All in all, I am SUPER happy I made the switch and very thankful that I found SonoHealth! Keep up the good work guys! looking forward to many years of healty lifestyle, confident I can count on my SonoHealth to keep track of my heart health.