This app was mentioned in 2 comments, with an average of 1.50 upvotes
It's almost certainly not what you're thinking of, but I quite enjoyed Bloody Alice. I myself stick with an old version (as Apple eventually insisted that they edit out the blood), but I'm sure the basic premise hasn't changed.
It basically plays like MSD/MSA with a rather more limited selection of units, except you also gain direct control over Alice - so you're sending out units while fighting against the enemy yourself. There's no PvP, but there is an ending, which I consider an important aspect of any decent game.
What, like Bloody Alice?
https://play.google.com/store/apps/details?id=com.studiodrill.bloodygirl&hl=en
(Which doesn't actually have any blood in it anymore. World's screwed up, yo.)