Unfortunately, there is no standard way to install fonts on Android devices.
However, in January 2018, I received this tip from backer Steph Parker on Kickstarter. He writes:
Anyone wanting to use the fonts in documents on Android works fine with “OfficeSuite Pro + PDF” from MobiSystems—link to Google Play.
- Download the PC / Mac version of the fonts.
- Extract the font files to the “External Fonts” folder. If you haven’t changed it, then it defaults to the “Fonts” folder in internal storage (may be listed as “/storage/emulated/0/Fonts” depending on your file browser), but you can name the folder anything you want.
- Open Office Suite and go to “Settings.”
- Make sure that the “External Fonts Folder” points to the folder where the font files are, and change it if it doesn’t.
- When the “External Fonts Folder” is set, tap on “Scan for External Fonts,” and the fonts will be installed.
If any files are open, you must close and re-open them to use the new fonts. And the fonts will be available for use in your documents.
The Albert Einstein and the Martin Luther fonts work as expected, but the Sigmund Freud typeface lists six different fonts but otherwise works as expected.
Note: If you have any additional information or workarounds for Android, please let me know; I will update this guide. Thanks.