I don’t with that one specifically, but I have a problem with flashcards as a learning method beyond the introductory level. It’s the same problem that I have with DopeyLingo, though the smugness of that site generates an extra level of dislike there. (To be clear, I don’t dislike flashcards, just Duolingo. I think that flashcards can have their uses, but IMHO there’s a structural problem with them.)
It’s the fact that most flashcards have the translation into your native language. That means that it is ALWAYS sucking you back to your mother tongue, and “all translation all the time” is not the way to become competent in a language. You need to break the link. This is the thing that I really like about Clozemaster; with listening exercises, with translation hidden, I can spend an hour not seeing or hearing a word of English - unless I’m unsure of the meaning, in which case translation is only a click away.
Of course that only works for intermediate to advanced learners who have at least a working vocabulary that they can extrapolate from. In the earlier days, when the student knows barely any words, a flashcard method can be helpful. (On Clozemaster the equivalent would be the multiple choice option.) HOWEVER… I’ve yet to see a flashcard tool which has, out of the box, what I suspect would be the most effective method; that is, images of the word, rather than the word in English.
Some of the earlier lessons on DopeyLingo used to do that; you would have a photo of a woman, and the word that you would have to select from the multiple choice list would be “una donna”, or “une femme”, or whatever. No. English. NOOOO. English. With questions like that the student’s brain associates the word with an IMAGE of a woman, or a road, or a bridge, or whatever. The problem is that these questions were a distinct minority. Most of the questions were the standard DuoLingo schtick of Target Language → English, English → Target language. Yes, let’s drag everything back to English so that when you’re in a bar in Seville (some time in 2024, if we’re lucky) your brain is still groping for the translations of what you want to say. (I recently took a look at the early lessons on DopeyLingo out of curiosity. The photos of people have been replaced by androgynous scribble drawings. I’m sure that’s a great improvement. Not.) I’m not saying that there should be NO option to go to English (or other native language) if you really need to and just don’t “get” the question, just that IMHO it’s better to stay as far from the native language as possible.
Brainscape does seem to allow you to create graphical or video flashcards for your own use but it would take a really, really long time to put together a significant number of decks. I have yet to see any product / service on the market which uses the graphical / video / audio approach with expansive, pre-built, curated decks. (Which is understandable, as composing such a course would be a LOT of work, and would require a lot of media.) If I were to find one I’d certainly consider adding it to my arsenal, but I don’t think it exists as of now.