This app contains a number of elegant stylish fonts that works for Samsung phones running Android Nougat (7.0 7.1.1 Oreo (8.0) and Pie (9.0).

How to use the fonts:
※ Install the app and RESTART your device
※ Go to Settings‣Display‣Font and screen zoom
※ Choose your favorite font and click APPLY

If you happen to change the theme use below steps if the fonts disappear
※ Go to Settings>Apps and uninstall the fonts app. Restart your phone.
※ Install the app again and restart your device
※ Go to Settings‣Display‣Font and screen zoom
※ Choose your favorite font and click APPLY

Enjoy!