From their blog http://blog.xero.com/2013/03/making-mobile-work/ http://blog.xero.com/2013/03/making-mobile-work/ Even with frameworks as amazing as Sencha Tou

From their blog http://blog.xero.com/2013/03/making-mobile-work/ http://blog.xero.com/2013/03/making-mobile-work/ Even with frameworks as amazing as Sencha Touch, we’ve found the ability to iterate as fast as we would like has become harder as our application has become more complex. The choice to go with HTML5 was very much a choice based on us – how do we use the skills we already have to build a mobile application? Unfortunately as the application grew we needed to hire to fill out the team, and we were never able to hire fast enough to fill those roles. Ironically those skills were equally as critical for the 'desktop' version of Xero – we were cannibalizing our own team and slowing everything down. With Xero, it seems more like a case of not being able to find great HTML5 developers and less an indictment of HTML5. This is good news for me.