This year, Appboy took over SxSW with a camera in hand and a simple mission: to learn about the future of mobile apps. We spoke with leading mobile entrepreneurs, including Ryan Holmes (HootSuite), Adam Goldstein (Hipmunk) and Brett Martin (Sonar), to get their perspectives on what is working and what isn't. We found that even though mobile lost the spotlight at the festival, there was plenty of excitement about the category and plenty of opportunity for disruption. We also found that the rules of the game had changed, with many mobile apps shifting their attention to user engagement and building lasting relationships with their customers. See what these entrepreneurs had to say and experience the energy of SxSW, from downtown Austin and Salt Lick's famous BBQ to Grumpy Cat and grilled cheese sandwiches at the GroupMe Grill, to the epic parties of Foursquare, WSJ and Made in NY:Austin.