Mobile App CAC Calculator - Customer Acquisition Cost for Mobile Applications
For mobile apps, distinguish cost per install (CPI) from cost per paying user (CPPU). With the same acquisition spend, CPPU equals CPI divided by the install-to-paid conversion rate. Use a consistent cohort and observation period for that comparison.
Mobile Apps CAC reference points
Mobile Apps acquisition channels
Apple Search Ads
Track installs and subsequent paid conversion for the same cohort.
Meta App Install Ads
Keep the attribution window consistent when comparing campaigns.
Google App Campaigns
Compare install costs with subsequent conversion and customer value.
TikTok Ads
Evaluate results for your audience and app category.
Influencer / UGC
Include production and creator costs in the comparison.
App Store Optimization (ASO)
Include work on screenshots, keywords, and store listings.
Mobile Apps CAC Measurement Tips
Track CPPU alongside CPI. In an illustrative comparison, $0.50 CPI with 1% paid conversion gives $50 CPPU, while $3 CPI with 10% paid conversion gives $30 CPPU. A cheaper install does not necessarily produce a cheaper paying customer.
Compare cohorts, platforms, and app categories separately. Use observed customer value and conversion to set acquisition targets; do not assume one platform always supports a higher bid.
Track cost per retained user alongside CPI and CPPU. Dividing cohort acquisition spend by users active on Day 30 measures cost per Day 30 active user. Keep that denominator explicit instead of calling it the same CAC measure as cost per new paying customer.
If you use predicted LTV for acquisition bidding, compare predictions with observed cohort outcomes before relying on them to set CPI targets.
Test ad creative with a plan for comparing results. Choose the number of variants and test duration based on traffic, cost, and the effects you need to detect; there is no fixed rotation schedule that works for every app.
Calculate Your Mobile Apps CAC
Use our free CAC calculator with your actual marketing and sales numbers. Includes a cost-category breakdown and optional LTV:CAC and payback inputs.
Open CAC CalculatorMobile Apps CAC: Frequently Asked Questions
Cost per install (CPI) is the cost to get one user to download and install your app. Customer acquisition cost (CAC) for mobile apps typically refers to the cost per paying user, which is much higher. If your CPI is $2 and 4% of installs convert to paying users, your CAC per paying user is $50 ($2 / 0.04). For subscription apps or apps with in-app purchases, CAC per paying user is the metric that actually connects to your LTV.
Apple’s ATT framework requires permission for cross-company tracking from iOS 14.5 onward. Without permission, advertisers cannot use alternative identifiers to bypass that choice. Apple provides privacy-preserving attribution options. Evaluate changes in reported acquisition cost using a consistent measurement method, not an assumed CPI uplift.
Compare CAC with gross-profit LTV for the paying users it acquires. If that LTV is $40, a CAC below $13 gives a ratio slightly above 3:1. This is an illustrative calculation, not proof of viability; payback, concentration among high spenders, and cash needs still matter.
Gross-profit payback = CAC / monthly gross profit per paying user. Dividing $60 CAC by $10 monthly revenue gives six months to recover CAC in revenue, before delivery costs. For a freemium app, also account for the delay before paid conversion; 14 days adds roughly half a month in an illustrative steady-revenue model.