Hearing heartbeat at 10 weeks?

Naomi
Anyone have experience with BabysBeat iPhone app to hear fetal heartbeat? It seems really early to detect anything but I gave it a try and here is what I heard:
Starts three seconds in:
http://mybabysbeat.com/MobileShare/video.php?id=niyhe9jr0b9c_ym7sv3ji_55bfk0bcsm4_cm8c3j&language=en-US
Tinyurl also for convenience: http://tinyurl.com/hnu9qyj
Could that really be it?