Here's a fact that changes how you should study: the ~1,000 most frequent words cover around 85% of everyday spoken English. The commonest 500 are the beating heart of that.
The catch is that these words are the ones that go quiet and fast — the, of, and, to, just, actually, sure. You already "know" them on the page. The skill is recognizing them instantly in a rush of connected speech.
That's why Lisenia Daily is engineered around those 500 words, recycled across many everyday contexts. Narrow, repeated exposure builds automatic recognition — the thing flashcards can't give you.
Catch those 500 at real speed, and suddenly you're following most of the English around you — at work, while travelling, in a film.