Mobilewalla is a big data venture that collects all publicly available information regarding mobile apps, computes analytics on top of this data, and supplies app intelligence and audience measurement to ad networks, ad exchanges, ad agencies, brands, ... Mobilewalla is an ad-tech data broker that buys location, device-ID and demographic data about you from other brokers. It offers a free online opt-out form (linked from its Privacy Center / Business Services Privacy Notice) that also covers targeted advertising, plus a separate online form for access and deletion requests; requests can alternatively be mailed to Mobilewalla Inc., 2472 Jett Ferry Road, STE 400-214, Attention: Consumer Rights Requests, Dunwoody, GA 30338. Denials can be appealed to privacy@mobilewalla.com. Because Mobilewalla continuously ingests new data from third-party suppliers, it is worth re-checking your opt-out periodically.