The proliferation of mobile device form factors has prompted a re-evaluation of how to best support mobile device users. Responsive Web Design is a promising technique for cost effectively responding to this challenge. However, to date most discussion has revolved around content-driven websites. But how might this approach apply to web applications? How does it compare to other approaches, such as device-specific workflows? In this talk Saasu’s Chief Design Officer, Grant Young, will explore these challenges and the Saasu team’s response to them, illustrated with examples from the Saasu online accounting application.