I decided to create digital graphic novel (of sorts) around the AmpliTube software that I use regularly on the iPad. I shared the booklet with IK Multimedia (creators of AmpliTube) who then shared the pages with their fans through social media. The booklet was created using screenshots from the AmpliTube iOS app and the Strip Designer iOS comic strip layout app. The rest was put together by me in InDesign.
I often use AppSumo to get great deals on graphic and development software. Now you can get $10 (after your first purchase) when you sign up at AppSumo too. Full disclosure, I also get $10.