🔥 Tier 1 - Must KnowID: cpiCostPerInstall
CPI - Cost Per Install
Total User Acquisition (UA) spend divided by total completed app installations
In Simple Words (Zero Jargon):
How much money you spent on ads to get one person to download and install your app.
Official Mathematical Equation
CPI = Total UA Ad Spend ÷ Total Completed App Installs
Why It Is Critical
CPI in isolation is dangerous. A ₹20 install that churns on Day 1 is far more expensive than a ₹120 install that stays active for 6 months. Always evaluate CPI alongside Cost Per Day 7 Retained User.
'A ₹20 install that uninstalls in a day and a ₹150 install that stays active for months are not comparable on CPI alone. The entire point of tracking post-install retention is to catch this before it is mistaken for a win.'
What You Get: Protection from wasting budget on cheap bot downloads that never open the app a second time.