Android

Official:

SponsorBlock supports https://m.youtube.com

This can be used with Firefox Beta

You can then install it directly from the Firefox Add-ons store like normal (No collections are needed anymore).

It's also possible to use it on a chromium browser, such as Kiwi Browser, from the Chrome Extensions Store, but Kiwi Browser is not recommended.

3rd-Party:

• There is a fork of NewPipe that supports SponsorBlock. Enable it in settings.
• LibreTube is an Android client for Piped
• SkyTube has support for SponsorBlock
• Clipious has support for SponsorBlock
• There are Android TV apps as well.