Monitor your sleeping baby with this iPhone app called Baby Monitor. Simply place the iPhone near your sleeping baby, if it detects noise, it places a phone call to the number of your choice, you can then listen in for activity from your baby. Great for when you are on the go or traveling, no need to pack your regular baby monitor. One feature that makes this application exceptional is that the monitor has unlimited range!
Even use it to monitor when older kids arrive home from school, etc. The applications are unlimited. It also will detect if your baby picks up the phone. Great for curious toddlers that wake up from their nap without making noise. A fantastic value at only 99 cents and the application can be downloaded HERE.