Appodeal

Appodeal is a mobile app monetization and mediation platform: it connects an app to multiple ad networks and allocates each impression to whichever bids highest.

Mediation exists because no single ad network fills every impression at a good price — running several in competition raises effective revenue per user, and doing that manually is impractical.

Integration cost is real: mediation adds SDK weight to your app, and each additional network brings its own compliance and reporting requirements.