Decco the toddler monitor is simple to use with the free smartphone app, it is a breeze to set up and pair to your iOS device in seconds. The app allows you to monitor up to 3 Decco the toddler monitor devices at the same time and tailor the style of alerts that you receive, including vibration, volume, and sound. Decco is a toddler-friendly baby monitor – With its cute design, it hangs on a doorknob and alerts parents if their child leaves their bedroom.