The PocketCPR

NBC News : Over 75 NBC news stations across the U.S. and Canada aired a Health Check segment about PocketCPR. Called the “in your pocket CPR coach” NBC reported PocketCPR could be the difference between life and death in an emergency. NBC also reported that “People who tried the device say it gives them extra confidence, to make sure they're performing CPR correctly.”   

I never saw this on TV but here is the app to look for on the app stores.