CPA (cost per acquisition)
In Apple Ads, CPA means cost per download. It is the price of getting your app onto a device, not the price of a user who installs, starts a trial or pays.
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Many ad platforms use CPA for whatever conversion you choose to optimize. Apple Ads is narrower: its acquisition is a download. That makes Apple Ads CPA a useful mid-funnel cost, and a risky number to treat as the goal for a subscription app, where the outcome that pays the bills comes several steps later.
How CPA is calculated
Adapty Ads Manager reports two versions of average CPA, one for each download definition.
- Avg CPA (Total): total campaign spend divided by total downloads resulting from a view or a tap on your ad within the reporting period.
- Avg CPA (Tap-Through): total campaign spend divided by the number of tap-through downloads within the reporting period.
Total CPA is always equal to or lower than Tap-Through CPA, because the same spend is divided by a larger number. Use one consistently when comparing keywords or periods.
CPA can also be read as CPT divided by download rate. A $1.50 tap that becomes a download 60% of the time costs $2.50 per download, so CPA rises when taps get more expensive or when fewer taps convert.
Per download, not per install or per paying user
An Apple Ads download is not the same event as an install, and neither is a subscriber. Adapty Ads Manager therefore reports separate cost metrics for each step:
| Metric | Formula | Measures |
|---|---|---|
| Avg CPA | Spend / Downloads | Cost of a download attributed by Apple |
| CPI | Spend / Installs | Cost of an install recorded by the app |
| Cost per Trial | Spend / Trials | Cost of a new trial start |
| Cost per Subscription | Spend / Subscriptions | Cost of a new paid subscription without a trial |
When someone quotes a “CPI” for Apple Ads, check which denominator they mean before comparing it with your CPA.
CPA benchmarks
Adapty’s Apple Ads for subscription apps 2026 report measured CPA as spend divided by downloads across 8,000+ apps and 1,000,000+ ad groups in 2025 campaigns. Country and category figures are separate aggregates; the report does not publish a category-by-country matrix.
| Scope | Average CPA |
|---|---|
| United States, all categories | $2.51 |
| Business apps, all countries | $3.42 |
| Health & Fitness apps, all countries | $3.14 |
| Education apps, all countries | $2.09 |
| Productivity apps, all countries | $1.48 |
| Utilities apps, all countries | $0.69 |
Source: Adapty, Apple Ads for subscription apps 2026. Per-row app counts are not published. A benchmark helps you spot an outlier; it does not tell you what CPA you can afford.
What CPA you can afford
Your allowable CPA comes from your own funnel, not from a benchmark. Work backwards: the revenue a paying user brings in over your payback window, times the share of downloads that become paying users, is the most you can spend per download and break even. Two apps with the same CPA can have very different outcomes if one converts downloads to trials and subscribers far better than the other.