Frank-Ol I use Twisted wave on the iPad for all my finishing of songs before I import them to ST3 it has all the basic features and more if you require, it’s easy to use and exports directly to ST3.Both software packages have never let me down yet, which is very unusual as I always find bugs in most software I use.
ST3 is my no 1 app on iPad Twisted wave is my no 2 all other apps are way down on my importance list.