Liftoff is a full-service app marketing and retargeting platform which uses post-install data to run true cost-per-action-optimized app install campaigns. Unlike traditional CPI campaigns, Liftoff uses lookalike targeting, machine learning, and a database of over 2 billion mobile profiles to acquire users at your target cost-per-action. Campaigns are optimized to drive engagement in events beyond the install, like booking a hotel, making a purchase, or subscribing to a service. Liftoff campaigns are 100% programmatic, buying across the major RTB exchanges and ad networks. Liftoff is headquartered in Palo Alto, CA with offices in New York, London, Paris, Singapore, and Tokyo. Visit http://www.liftoff.io.