The collected data is saved on the user's client device only. No data is sended to a server or any other applications except of SMS messages.
The application can take pictures. A Picture is only taken when it is requested through a command message from a granted phone. The pictures are stored on the client device as long as no one deletes them.
Location is only fetched when it is requested through a command message from a granted phone. The location is only responded to the phone, which sent the command.