I was looking to customize the look of the text on my S6 and found this app called HiFont. For Samsung Galaxy phones, we don't need root to add fonts to our device. Once you download the font, you can go to Settings -> Display and wallpaper -> Font and select your downloaded fonts. Some are paid but alot of good ones are free. I am currently using Robotoslab and attached some screenshots. I do notice that it does change most of the header and even some reading fonts on some apps but some apps and webpages can override the selected fonts.
Have fun and let's see some screenshots of what other cool fonts everyone is using.
https://play.google.com/store/apps/details?id=com.xinmei365.font&hl=en
Have fun and let's see some screenshots of what other cool fonts everyone is using.
https://play.google.com/store/apps/details?id=com.xinmei365.font&hl=en