With the Pro or Enterprise plan you can add your own customization to your Diggles by uploadingcustom fonts.
To upload your custom fonts, open the Builder by creating a new Diggle or opening an existing one. Here, click the design tab and select the fonts drop-down menu.
Select the “Upload custom font” button at the bottom of the menu.
Choose the font file from your computer (supported format is .ttf).
Font licensing
Ensure you have the right to use and distribute the custom font.