Appness is a CPA-based marketplace that connects mobile app developers and advertisers with hundreds of Facebook media buying experts worldwide. This allows advertisers to expand their in-house media teams and take advantage of local expertise to manage campaigns at scale. Advertisers pay for business results like installs and in-app events, not clicks or impressions, and can choose freelance media buyers and agencies to work with based on location and performance statistics. The platform provides analytics and controls for advertisers to track campaigns, creatives, and media buyer performance.