I used the Owlet Smart Sock on my son from when he was six weeks old. He is now 12 months old and I cannot recommend the product highly enough. The Smart Sock is easy to set up and use and the app gives me live readings of my son’s heart rate and oxygen levels. You can rest assured that the Owlet Smart Sock is helping keep an eye on your little one. This means I can relax and check the app, rather than hover over my baby, and catch up on vital sleep.