AppsFlyer offers a free trial for evaluation rather than a permanent free tier. According to G2 reviewers, the free tier is described as quite limited, with one reviewer explicitly noting that many essential features, including fraud protection, are locked behind premium plans, making the free version feel restrictive for serious user acquisition work. AppsFlyer's paid plans unlock advanced modules such as Protect360 fraud detection, data locker, cost aggregation, raw data API access, and incrementality measurement, most of which carry additional charges on top of the base subscription. G2 reviews of AppsFlyer consistently flag that nearly every meaningful add-on is separately billable, compounding the total cost of AppsFlyer's pricing significantly.