KeyLemon is a useful tool for face recognition using a webcam. With the help of this software we will secure access to our computer or laptop, equipped with a camera built into the device or connected to a USB port. After installing the KeyLemon application, we do not need to use the standard method of logging into the operating system or social networking sites. It is enough to configure the program with the connected camera correctly. Then, after each computer start-up, we can log in without entering any login data, but only looking at the lens of the active camera. Thanks to built-in Face Recognition technology, the program provides full security when logging into the system and offers access only for authorized users. KeyLemon recognizes our face without any problems and most importantly, it can be very helpful and effective when logging in to social networks like Facebook or Twitter.