Meet the Simple Home WiFi Motion Sensor: a simple gadget that lets you remotely monitor movement inside your home using passive infrared sensors. It can detect motion up to 15 feet away and alerts you when motion is detected with push notifications. You can use this to trigger other Simple Home products to turn on when motion is detected and save money in the process.
You get push notifications when motion is detected in your home. This motion sensor is available for under $25 at this time.