Adopting a pet or two is lots of fun but having to get up to open the door for them every time they want to go out or come in can get a bit tiresome. The Power Pet PX2-WiFi Pet Door can help. It is an iPhone connected pet door that you can control from anywhere. It is designed to work with pet worn ultrasonic collars too.
You can set up to 20 timers to control when your pet can come in and go out. The companion app not only lets you put this pet door on a schedule but shows you events, such as door opens and the # of times each sensor has been triggered.[official site]