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Google gives Android users a way to install unverified apps if they worked hard for it(including waiting 24 hours)
(android-developers.googleblog.com)
This is a most excellent place for technology news and articles.
Meanwhile, TVDB doesn't have an app, and IMDb and Wikipedia have shitty apps, so I've installed all three as web apps. You can do a lot with web apps these days. It's not all inclusive, but it is something. And that's on iPhone. On Android I actually prefer to use the browser (Firefox with uBlock Origin).