@electro1 they do need to update their website a bit fwiw. Friendiqa is not that great at all. But no, that's not an official one either. They do not have any first-party app at all.
Edit: You can also find a help section wherever you might choose to create an account, or a wiki available at wiki.friendi.ca/ with more information.
And if you want to get more familiar with how Friendica works, you can also check out (and share) anubis2814's videos on YouTube on the topic: