Apple Ads
Plan campaigns off the same keyword data the organic side uses, then check what the spend actually bought.

Planning
The planner builds a campaign structure from your keyword research: which terms are worth bidding on, what they should cost, and which ones you already rank for well enough that paying is a waste.
Because it reads the same keyword set as ASO Studio, the paid and organic strategies stay in step instead of competing.
Spend vs. lift
Campaign performance is charted against organic downloads over the same period, so you can see whether paid traffic is adding installs or buying the ones you'd have got anyway.
On this page in the app
- Apple Ads planner