Why Apple Search Ads Install CPA Is Not Your Real CAC (And How to Fix It)

You launched an Apple Search Ads campaign. You set a $2.50 target CPA. Apple reports you hit it. Three weeks later, your RevenueCat dashboard shows twelve trial starts and zero conversions from that same traffic. Your install CPA looked perfect. Your actual customer acquisition cost is somewhere between undefined and catastrophic, and you have no idea which keywords are producing paying users and which are just eating your budget. This is the core problem with Apple Search Ads reporting in isolation. The platform tracks installs with remarkable precision and calls it conversion data. But installs are not customers. Trials are not revenue. Until you tie Apple Search Ads keyword spend to your payment provider's transaction data, you are making spend decisions on vanity metrics that have nothing to do with your business outcomes. Grometrics connects Apple Search Ads campaign and keyword spend directly to RevenueCat purchase data so you can see real ROAS per keyword, per campaign, and per ad group. This is not a dashboard overlay or a estimated attribution model. This is actual revenue from actual transactions mapped back to the source that drove the user to your app in the first place.