I use this app to create images that I use to crochet using single stitch or half double stitch.. Currently I made a small pixel image I am using as a draft for a granny square blanket. Its an amazing app. Just in case of a crash which I havent not had happen often, I recommend saving every so often. You can even import photos to turn into designs. Its quite an amazing app and worth the purchase.
Silent_jokester about StitchSketch