EKG HISTORY: With the press of a button, email your EKGs to your doctor or save them on your phone, no subscription required.KardiaMobile is COMPATIBLE WITH MOST POPULAR PHONES and TABLETS. To use your Kardia device, you must download the Kardia app on a compatible device. Visit alivecor.com/compatibility to check the list of compatible devices.NO SUBSCRIPTION REQUIRED. Detects Atrial Fibrillation, Bradycardia, Tachycardia, and Normal Sinus Rhythm without a KardiaCare subscription.Instructions for use, tutorials, troubleshooting, and additional product support is offered through the product's Kardia app.KardiaMobile is not tested or recommended for use with pacemakers and ICDs. KardiaMobile does not check for heart attack.