I stumbled upon an old video of Adobe Photoshop Touch and it really pains me to realize that I am over a year late and can no longer get it. The suite of apps that replaced it feel like a decision of a greedy project manager to attempt to squeeze money off their customers.
Having that said, Photoshop Mix seems like the app I need, but the images produced are ridiculously pixelated even though the originals are high res.
This is a known error in Adobe Forums and I read a reply from an Adobe Developer that they were working on it... This was written over a year ago.
Truly disappointing.
JoeyCastellon about Adobe Photoshop Mix - Cut out, combine, create