Gogobot iPhone coach marks screenshot
Clever guides @Lili Weißensteiner Weißensteiner Tu
Secret iPhone coach marks screenshot
Up iPhone coach marks, walkthroughs screenshot
Flickr. Simple and minimal.
NN Group article: "Instructional Overlays and Coach Marks for Mobile Apps" Summary: Instructions in mobile applications must be designed for optimal scannability, as users tend to dismiss them quickly and do not read thoroughly.