Been testing iPad pro for a couple of days recently. Trying out Adobe Sketch made me think iPad Pro is not suited for me at all. Everytime I wanted to pinch zoom unwanted lines were drawn, for example. ProCreate gave me a completely different experience; intuitive, much better feeling in general, no problems with pinch zoom function whatsoever. I use Photoshop a lot and this app made me feel very familiar quickly. Well worth those couple of dollars IMO, but that's just my 5 cents.