The affiliate glossary ↗AFFDude / Field notes
CPI
In plain English
What does CPI mean?
Cost per install: a mobile-app model paying a fixed amount for each app install, often with a post-install event required.
CPI offers pay when a user installs an app and, increasingly, opens it or completes an in-app event (a registration, a level, a first purchase). Pure install-only offers are rarer now because install fraud is easy; expect KPI clauses that cut payment if retention or event rates fall below a threshold.