Install Referrer (Android)

Install Referrer is Google Play's official mechanism for passing referral and attribution data from the play-store click to the freshly installed Android app. When a user clicks a link that routes through Play Store (with the correct referrer parameters appended), Play Store captures the parameters; when the user installs the app, Google's Install Referrer API delivers those parameters to the app on first launch. MMPs and ad networks use this signal as the deterministic attribution backbone on Android.

How Install Referrer works: 1. Ad click fires a URL with referrer parameters appended (e.g., `https://play.google.com/store/apps/details?id=com.app&referrer=utm_source%3Dmeta%26campaign%3Dsummer`). 2. User taps the URL, Play Store opens with the parameters captured. 3. User installs the app. 4. On first launch, the freshly installed app calls Google's Install Referrer API. 5. The API returns the captured referrer parameters. 6. The MMPGlossaryMobile Measurement Partner (MMP)A third-party attribution provider (AppsFlyer, Adjust, Singular, Branch, Kochava) that adjudicates which ads drove which installs across multiple ad networks, with i... SDKGlossarySDK (Software Development Kit)A packaged set of code, libraries, and tools a developer drops into an app to add a capability — the integration unit for attribution, analytics, ads, and monetizati... reads these parameters and attributes the install to the source campaign. This flow is deterministic — no probabilistic matchingGlossaryProbabilistic AttributionAttribution that statistically estimates which ad click drove an install using non-unique signals (IP address, user agent, timestamp) when a deterministic device ID..., no fingerprintingGlossaryFingerprinting (Probabilistic Attribution)Probabilistic identification of devices based on combined signals (IP, device model, OS version, screen size) rather than deterministic identifiers — explicitly rest... required. The referrer data is passed cryptographically by Play Store and is highly reliable.

Why Install Referrer is the cleanest Android attribution

• Deterministic — no probabilistic matching, no fingerprinting. Reliable.
• Not subject to ATTGlossaryApp Tracking Transparency (ATT)Apple's iOS 14.5+ framework requiring apps to display a system prompt and obtain user consent before accessing the IDFA or tracking the user across other apps and we...-style restrictions — Apple's ATT doesn't apply to Android. Privacy SandboxGlossaryPrivacy Sandbox (Android)Google's multi-year initiative to introduce privacy-preserving alternatives to GAID-based ad tracking on Android — the platform's eventual SKAN equivalent. for Android (full rollout ~2027) may eventually layer aggregated attribution alongside Install Referrer, but as of 2026 Install Referrer remains broadly available.
• Privacy-preserving by design — only data the user / ad networkGlossaryAd NetworkA platform that aggregates ad demand from many advertisers and matches it to publisher inventory through real-time auctions. explicitly attached to the click URL flows through; no behavioral profiling.
• Supported by all major MMPs and SANs — AppsFlyer, Adjust, Singular, Branch all integrate; Meta, TikTok, Google Ads, AppLovin, ironSource all use it.

What gets passed in referrer parameters

• UTM-style parameters — utm_source, utm_campaign, utm_medium, utm_content.
• MMP-specific identifiers — AppsFlyer click IDs, Adjust click tokens, Singular click identifiers.
• Campaign / creativeGlossaryAd CreativeThe visual and audio content of an ad — video, image, copy, sound. The single most important variable in modern mobile UA, lifting IPM and lowering effective CPI. IDs — for granular attribution.
• Geo / language signals — sometimes.

The payload format is configurable per ad network; MMPs typically standardize their own parameter set.

Limitations

• Only works through Play Store URL — if the user clicks a deep link that bypasses Play Store, Install Referrer doesn't fire.
• Single referrer — captures one set of parameters per install. Doesn't support multi-touch attributionGlossaryMulti-Touch Attribution (MTA)An attribution model that distributes install credit across multiple touchpoints in the user journey — not just the last click. natively.
• Privacy Sandbox eventual impact — full Privacy Sandbox for Android (~2027) will introduce aggregated attribution alongside Install Referrer; some industry observers expect Install Referrer to be limited / restructured at that time.
• Not iOS — no equivalent on iOS. Apple's first-party-attribution mechanisms (Apple Search AdsGlossaryApple Search Ads (ASA)Apple's ad platform for promoting apps in App Store search results and other App Store placements. The highest-intent paid acquisition channel on iOS. Attribution API) are separate; for general iOS attribution, the post-ATT stack relies on SKANGlossarySKAdNetwork (SKAN)Apple's privacy-preserving attribution framework for iOS — returns install credit to ad networks with a deliberate delay and aggregation, without exposing any device....