You can have a free trial, ixion. I’ve only just signed up for £4.99 (IIRC) a month.
Yes, it’s interactive in that you have a lot of keyboard input, choosing what you hear, writing this or that in Welsh or English, etc. and it tells you whether your answer was correct - showing you the right answer if not.
There’s a ‘speaker’ where you can hear the same phrase repeatedly, plus a ‘slow’ version, which I’m finding very useful.
So far (I haven’t got very far!) it’s apparently working on much the same sort of principle as the listen, understand, repeat, method, which of course is how you learn as a child. However a native speaker child has years of total immersion in a language, so it’s just not the same for an adult learner, particularly when their brain is past the ‘mopping up’ stage.
Hence I do need pen and paper, and something written to refer to, even at this stage.