Mobile first is becoming an increasingly prominent reality in the startup realm. One example: Guidecentral.
Guidecentral is a simple, fast, visual way to create, discover and share how-to guides and do it yourself projects. Available for iOS, users create guides using the in-app camera, adding text to each step along the way. They are then able to share their creations with members of the Guidecentral community as well others via Facebook, Twitter, Pinterest or e-mail.