Despite the arrival of LINE WhatsApp remains in my opinion the best option in messaging applications for Android. However, there is a better alternative to the official application found in the Google PLAY.
WhatsApp Plus is a mod of the official application WhatsApp developed by one of XDA users that includes some improvements that let you change the look of WhatsApp and the conversations.
WhatsApp PLUS, customizing WhatsApp
While WhatsApp has some modules that enrich the application and add new features as Memes for WhatsApp, which allows you to add memes in conversations; Magiapp to trick and edit photos before sending, Z-WhatsArt to paint messages; Paint for Whatsapp for draw; voice for WhatsApp to send and listen to messages by voice; WhatsApp Plus, goes further and allows you to customize the visual appearance of the app.
With WhatsApp PLUS you can always change the background colors, letters, names and other features of the user interface to give a unique style to your conversations.
Also this mod is available in two versions that have different user interfaces on the one hand we have the standard version of the application and on the other the Holo version which gives an aspect much more in line with Android.
Note: Before you install WhatsApp PLUS is necessary to uninstall the official application from your devices.