How do I measure Apple Search Ads campaigns?

Apple Search Ads (ASA) is a platform that allows developers to promote their apps on the App Store through targeted sponsored search results, effectively reaching potential users at the moment of intent. It offers two levels: Basic and Advanced, with Basic being more automated and limited to a $10,000 monthly budget per app, while Advanced provides full control over campaign customization and access to a "Custom Reports" tool. Although ASA provides valuable attribution data through Apple's iAd and AdServices frameworks, its reporting tools are limited in terms of insight and visualization, lacking the ability to track customer cohorts over time or tie metrics to specific users. RevenueCat, an app monetization platform, enhances ASA data utility by integrating with Apple's AdServices framework, allowing developers to visualize subscription lifecycles and make informed decisions about their ASA spending through its analytics tool, RevenueCat Charts.