I have been using this app for over 3 years now after trying dozens of other flash card apps. For me it has the perfect combination of features (spaced repetition, ease of use, ability to import/export sets, good editing features, etc). I particularly like the statistics section (I have flipped 130,000 cards since starting to use it)
Lost Everything! I purchased the premium key and as soon as I did so I lost all of my nearly 200 flashcards. When I found this out I refunded my money immediately. It is not worth paying any money for a flashcards app as I've learned. What a pity!! I will go with Quizlet.
Somehow my tablet (note 2014) overheats when I use thid app. The features are great though . I recommend it. Edit : my tablet does overheat from time to time, but it happens on a constant basis with flux cards. I guess its an hardware issue which is somehow always activated by fluxcards.
I've been using it for a while, and love it. It's simple, and has the easiest method of adding decks from quizlet yet (making my own is too time consuming). I've started to study multiple decks at a time to solidify vocabulary, which makes me want to upgrade for the longer SRS period. However, when i use multiple decks, random characters/letters go missing/don't show in the cards, which makes it unusable. If i could rely on this app, I'd certainly upgrade. EDIT: I found another workaround, where I combined all of those decks into one mega-deck. Worked most of the time, and so far after using the advice below (smaller fonts), it's worked all the time.
Best flashcard app for long term use I've used many apps but this is the only one that keeps working efficiently after years of drilling.
Finally I've been looking for a good flash card app where you can draw both the answer and the question because a lot of symbols used for engineering are not in a keyboard and this does it perfectly. This has helped me a lot!
Fixed LearningActivity for older devices
The fix was to remove security features that would prevent third party apps from functioning as a LearningActivity. This being possible now does not mean it will stay open for all future.