CPI and CPE are two common terms used in mobile app campaigns. They look similar, but they usually mean different user actions. Understanding the difference helps visitors know what may be required before they continue to a partner page.
CPI usually means cost per install. In simple user language, a CPI offer often asks the user to install an app and open it. Some CPI offers may also require a short first session, such as keeping the app open for a few seconds or completing the first screen. Even when an offer is called CPI, the partner page should be checked because the final rule may include extra conditions.
CPE usually means cost per engagement. A CPE offer requires more than a basic install. The user may need to play games, reach a level, complete a tutorial, collect a number of coins, register, or spend a minimum amount of time using the app. CPE offers generally take longer because the advertiser wants to see real engagement after installation.
A user who treats a CPE offer like a CPI offer may stop too early. For example, installing an app may not be enough if the requirement is to play three games for five minutes each. The action must match the partner instructions. If the action is incomplete, the partner may reject the conversion.
Both CPI and CPE offers can be limited by country and device. An Android CPI offer should not be completed on iOS. A United States CPE offer should not be completed from another country or by using a VPN. These rules are part of traffic quality and advertiser targeting.
Read the summary, continue to the partner page, and follow the current partner instructions. Use a real device, avoid duplicate installations, avoid VPN or proxy traffic when an offer is country-limited, and allow enough time to complete the required action.