Definitely AnkiDroid, as Taevas has already mentioned.

For iOS, the official app is AnkiMobile Flashcards, although it does cost about $25.

If you do want to get into it, I suggest starting with Strange New Worlds and Lower Decks.

Well, I started watching Star Trek TOS so I would get more of the memes on tenforward@lemmy.world 😅.

I do like to browse by all instead of subscribed, which is a good way to discover more communities. Of course, I do have to block a lot of communities to avoid stuff I’m not interested in… which is basically just stuff in languages I don’t understand and furries (speaking of niche communities, plenty of those). But I even enjoy seeing local posts from places in another country.

Ya, I think the key is not to focus on niche communities, but more generic communities. e.g., someone mentioned a dead Morrowind community, but it’s probably better to invest in a more generic gaming or maybe even pcgaming community.

Lemmy just isn’t that big and can’t support many niche communities.

That being said, I definitely see some niche communities regularly popup in my feed, so there are some active ones!

Voldemort is Señor Tenebroso.

It’s for calculating power levels in Dragon Ball Z.

Let’s maybe just leave that to his wife. Or his mother.

My understanding is that he got his start doing extreme challenges himself, so now that he’s got the money, he challenges fans and gives prize payouts. He also still does his own challenges once in a while.