Lexilize is an SRS flashcard application that adds slightly more interaction than the average SRS app. When you learn each deck, you will engage in matching, guessing, recall, and typing activities to test your memory. You can later choose specific activities for review, making it somewhat more engaging than simply flipping over the card and seeing if you got it right or not.
When you add a language, you can add default categories, like fruits or feelings — however, it’s probably best to make your own set of flashcards, as these probably won’t help you learn to speak a language very efficiently.
For each new card you add, you can insert a transcription, example sentence, and image to your card. Lexilize seems to automatically insert text-to-voice, so if you don’t mind listening to a robot, this feature can be useful.
Another option is Anki, whose user interface is a little outdated but 100% free. Brainscape is also comparable to Lexilize, but they each have their own strengths. While Lexilize has a variety of flashcard activities, Brainscape only has one type of card. However, Brainscape’s free decks for language learning teach you words and phrases that build on each other as they advance, rather than just focusing on simple vocabulary. Brainscape also has refined the SRS system by letting you identify your recall strength on a 5-point scale, while Lexilize only lets you identify ‘forgotten’ or ‘recalled’.