Meet the Abode Motion Sensor: a wide-angle motion detector with HomeKit support that alerts you on your phone when there is unexpected activity. It is completely wireless and has a replaceable battery that lasts up to 5 years. It uses body heat for motion detection.
The Abode Motion Sensor has a 110-degree detection radius at 35 ft. It has 2 sensitivity levels and can operate in temperatures 14 to 113F. More info is available here.