Appstack, made by Appstack Tech, Inc., is a measurement and attribution service for mobile apps that run paid ads. Attribution means finding which ad, campaign or link led to each install and later purchase, so that the real return on ad spend (ROAS) can be computed.
Developers add the Appstack SDK (software development kit, a code library inside the app) for Swift, Kotlin, React Native, Flutter or Unity. Appstack links send each user to the correct app store and record the click; the service matches installs and in-app events to the ad in real time, at device level. It imports campaigns from Meta, Google, TikTok, Apple, Snapchat and Reddit ads, and receives subscription and payment events from RevenueCat, Superwall and Stripe. Signal engineering sends enriched events, such as a qualified trial, back to the ad networks. Its enhanced app campaigns are web campaigns that send users straight to the app store with no landing page. Creators can get their own links and a share of the revenue they bring.
It is a hosted service with a free plan, a monthly plan plus a fee per paid install, and Enterprise pricing.