You may think this app works because it "randomly" selects beats to appear on the screen. It said my heart rate at my chest was 143 bpm, but when I placed it on my belly it either shows nothing or a 67-85 bpm. Every so often it will say 123 bpm and 143 bpm on belly, but I get the same readings on my back, palms and thigh! Dont waste your money!
Briby81 about Baby Beat™ Heartbeat Monitor