Please note that your device MUST BE ROOTED to use Fontster.
If you your device is not rooted, or if you don't know what that is, DO NOT INSTALL this app.
Fontster allows you to easily change the system wide fonts on your Android device within a well designed Material UI. In order to use this app, your device must be rooted. What makes Fontster special is that it will replace all font styles used by the operating system. Unlike other font installers that only replace a few of the font styles, Fontster will change all styles resulting in a consistent look across all text. This means that practically all of the typed elements throughout your devices UI will be changed to your desired font, including the keyboard, digital clock widget, web pages etc.
About 150 full font families to choose from (more are constantly being added)
Backup and restore fonts
Fontster works best with devices running close to stock (AOSP) builds. Therefore Nexus devices work great with this app. Although the app has been tested and confirmed to be working on some other non-AOSP devices (Samsung Touchwiz, etc.), it is highly recommended to use caution (make backups) and be prepared for things to go wrong if you are using a non-AOSP device.
Fontster is completely open source! Check out the code on GitHub via the link below, and feel free to make contributions by sending a pull request.