I purchased this because I wanted to use an alternative to "Quizlet", which is brilliant, but I don't use it all the time.
SLAY does not have all the features of Quizlet, as it specifically creates flashcards and pdfs, word documents and various sources. SLAY has this functionality and so more more.
I purchased plan 2 and wow its so easy to use, and for me this is always the test of a really good product is how quickly will you get bored of a new toy and can you really utilise it.

SLAY for me meets these 2 criteria immediately. It has features in one app I never even knew I needed. Try the write essay feature. I tried "I'm bored" and created a paragraph.

Youtube videos, PDF and word documents, website links, etc ... all work .

Only minor gripe is the text on the android app. For now it squashes letters together making it difficult to read.