Best methods to change font in android. users can change the size and even style of android fonts. font changer (custom font) to change font in android without root; the fonts can be easily downloaded and run on any android device. the rooted device users can download the custom font from any other font apk or website. afterward,. How to change font on android phones. method 1st:-using go launcher ex (for non rooted phone).go launcher ex is one of the best and popular android launcher apps that allow you to change your system fonts and provide your android device a new look with amazing colors and styles.. Home