GeoCam: Geo-fencing for Nest Cam® app for iPhone and iPad
This app provides multi-user geo-fencing for your NestCam so that when all users leave the home, the camera is armed and as soon as one of the users comes home, the camera disarms.
Specifically, the last person who leaves the house will cause the Nest Cam to be armed and start looking for motion and sound and the first registered person who enters the house would disarm the Net Cam automatically. No more manual arming/dis-arming the camera and no more false alarms.