The knockdown, drag-out fight for customers has never been as fierce or as full of potential as it is on mobile. User acquisition costs are at an all-time high, up 100% year-over-year, and without active engagement most apps lose 70% of users 30 days after download. But if you think you have it tough, this Mobile Saturday session will offer you new perspectives. You’ll hear from eHarmony and Zillow on how they handle a seemingly starker challenge as successful app user experiences can mean an always-vanishing customer base.