I've been trying to learn mandarin for a while now, and have just been using some HSK flash cards with anki for a while now (about 2k/3.5k through the cards for level 1). I'll have to give this a try.
For someone who isn't entirely new to mandarin will this feel like I'm drudging through basic concepts again?
Not at all. For example, if you already know the HSK1, feel free to start directly on the World 2. Each world = one HSK for now, and you can learn up to HSK 5 with the current application (HSK 6 on the way).
In case you stop in the middle of HSK 1, going through the stage should be very easy. I still think you should give it a try, as even if you know the word, you'll also make sentence and learn to talk (or listen if you don't like to talk). Review are only for words right now, and if you know them, they won't bother you a lot ^^
Yes I am aware of that, my point is that if you would have let me at least try out some mechanics for a few moments I might have been more inclined to sign up.
For someone who isn't entirely new to mandarin will this feel like I'm drudging through basic concepts again?