I loved Beatmaker2 and Beatmaker3 is way beyond just a Beatmaker. If you like making hip hop beats and you have an ipad this is a no brainer as a free app. There are in app purchases for extra audio content but you really don't need any of that to make beats or whole tunes with this.
This is a video tutorial I did when it first was released last year.
I also wrote a review for it at AudioNewsRoom
http://audionewsroom.net/2017/07/intua-beatmaker-3-review-a-whole-new-app-in-its-own-right.html
I am very much into iOS as a music making platform, hopefully some seeing this and some of my other videos will start seeing ipad as a realistic option for music production