WhatsApp Blue is a useful modification for the WhatsApp application, which allows the user to change the interface parameters, or use additional functions in it that are not available in the main version of the messenger.
The functionality of the mod allows you to increase the level of security of your data, use a huge set of fonts, view additional information of your contacts, exchange files of different formats, and apply an extended catalog of themes that change the appearance of the application.
It is also worth considering the fact that the application is not official, according to which access to some services will be closed. For example, it cannot use data backup using Google Drive. So keep in mind that in the event of a problem while chatting or sending data, it will not be possible to get a backup copy of it.