According to a Dutch developer, the privacy settings in WhatsApp are broken. By adding the phone number of user to its open source tool is able to track any change of profile picture, privacy settings or statuses from any user.
The open-source tool, can retrieve anything like the user's profile photos and status messages. It can also retrieve the user's timeline to show when he or she was actually online. The software has to be installed on a server and includes a web interface that continuously tracks the targeted user. The developer of the tool states he has created the software to demonstrate how broken the privacy settings in WhatsApp are.Read more