I ranked the best flashcard apps after studying two careers
Career changed from accounting to nursing not too long ago, used flashcard apps heavily through both. Different subject matter (regulations and tax codes vs anatomy and pharmacology) but the same underlying skill, memorising tons of stuff long-term. Here's my ranking of the apps that survived both phases.
anki: top of the list bc nothing else matches the spaced repetition algorithm, fsrs update made it even better. setup is brutal but if you're going to memorise content you'll use for years (cpa exams, board exams, etc), anki is the right tool. cards I made for accounting four years ago I can still review and recognise 80% of.
remnote: best one imo, note taking and spaced repetition live in the same place, so pharmacology readings become review cards without app switching.It also has a pdf annotator built in.
brainscape: tried it during cpa prep, confidence rating system is interesting but the paywall scope killed my interest. wouldn't recommend unless you have specific reasons to want confidence based scheduling.
quizlet: only used it for early career vocab stuff like accounting terminology. useful for surface level memorisation, weak for the kind of integrated knowledge you need on professional exams.
mochi: clean and minimalist, smaller deck library. used it briefly during a weird interim phase but came back to anki bc the algorithm just works better.
If you're starting from scratch and want a recommendation, anki for serious memorisation work, remnote if your studying is mostly note driven and you want both jobs in one app.