A free program for Android, by Salvatore Catania.
Watchdog is an android application that can be used as a security system to protect you against the threat of someone who is following you. The app can be set to work in different ways, but in order to use it properly, you need to configure it first.
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There are 3 alarms that you can set, and each of them has its own function. The first one is the video recording. In this case, if the person who is following you is a man, you will receive a notification every time the person is moving. The app will also send you a notification if the person is still for a long time.
The second alarm is the phone call. If the person is following you and if you have set the phone call alarm, you will receive a notification every time the person is calling you.
The last one is the notification. This one is useful to receive information about the person who is following you, and to be able to see him on the map.
