Let your iPhone or iPad baby-sit your infants. The $3.99 Baby Monitor 3G app works with a pair of iOS devices. Place one iPhone or iPad in the baby’s room, while the parents keep the second. You can get real-time video monitoring if both Baby and Parent stations are on same Wi-Fi network. Parents can listen to their babies and even talk to them via Wi-Fi or a 3G/4G connection. With the parent’s station in sleep mode, any noise in the baby’s room sends a vibration alert. Even with an actual baby sitter on duty, parents can still see and hear their child from wherever they are.