I've been using bleep!BOX a lot over the last few weeks and was amazed to find how much stuff I've actually started to make using it. Having said that I often find that this happens with apps. If I don't use them for a while and then go back I realise that I'd started off loads of tracks and usually never finished any of them.
Anyway, back to bleep!BOX. What a superb app it is. Undervalued these days I think. It has so much potential, so much you can do with it. For electronic music it's excellent.
It does have the odd downside. I think once you've got into the workflow and UI it makes sense, but it can be a bit off putting at first, and might cause a new user to give up if it doesn't make sense.
But if you don't know the app, in my view it's well worth investigating.