Vaia is the international name for StudySmarter, a company founded in Munich in 2017. The rebrand arrived in 2023 for English-speaking markets while the StudySmarter name stayed in Germany, Austria, and Switzerland, which is why the same product surfaces under two names in search results and why students regularly assume they are two different apps. They are not: one company, one product, a different label depending on where you are standing when you download it.
What it does sits close to what Scholarly does, which makes this a more interesting comparison than most. You upload a document and it generates flashcards and study materials; those cards are reviewed with spaced repetition; there are quizzes, a study planner, textbook solutions, and a podcasts feature. On top of that sits a library of millions of sets other users have made and shared. The free tier is ad-supported, and the paid tier removes ads and adds offline access, CSV export, unlimited learning sets, and unlimited AI assistant chat. Pricing moves by market and promotion, so read it on their own site rather than from any comparison page including this one.
The differences show up after the upload. Vaia's centre of gravity is the flashcard: the library, the export, the review scheduling, and the mobile apps all serve cards, and serve them well. Scholarly's centre of gravity is the source. One upload can come back as cards, a quiz, a study guide, a mind map, an audio overview, or a narrated video lecture, and each of those carries a citation to the page it came from, so the material stays checkable rather than becoming a second document you now have to trust. Video generation from your documents, exam board and past paper alignment, and teacher assignment tools are not part of what Vaia advertises.
Where you land depends on how you study rather than on which product is better made. If your revision is mostly cards, on a phone, offline, ideally starting from a set somebody has already written, Vaia's apps and library are a straightforwardly good answer and this page will not try to talk you out of one. If what you have is a folder of lecture PDFs and recordings, and you want each of them turned into several different ways of learning the same thing with a route back to the source when something looks wrong, that is the shape Scholarly is built around.