This seems to suffer from the same problem that many of these learning apps have: it forces you to start as an absolute beginner, even if you aren't one. If you are on an intermediate or advanced level, this website could still be useful, but you first have to go through thousands of very easy sentences.
It could very well gauge my level by upping the difficulty until I start making too many errors, and then taking it from there. But nope, by default it'll start with the 1000 most common words, which has zero learning effect, and is mostly annoying and boring.
It could very well gauge my level by upping the difficulty until I start making too many errors, and then taking it from there. But nope, by default it'll start with the 1000 most common words, which has zero learning effect, and is mostly annoying and boring.