# Mobile Attribution

> The process of identifying which marketing channel, campaign, or touchpoint led a user to install or engage with a mobile app.

- Canonical: https://redirectly.app/glossary/attribution
- Site: [Redirectly](https://redirectly.app) — deferred deep linking for Flutter & React Native

## Definition

Mobile attribution is the science of determining which marketing touchpoint — an ad click, an email link, a social media post, a referral, or any other interaction — led a user to install or engage with a mobile app. It answers the fundamental marketing question: "What caused this user to take this action?"

Attribution connects the dots between marketing spend and actual results: installs, sign-ups, purchases, and other in-app events. Without attribution, marketers are spending blindly — unable to measure ROI or optimize campaigns.

## How it works

Mobile attribution uses several matching techniques to connect a pre-install interaction to a post-install app open:

**Deterministic matching** — The most accurate method, using unique identifiers:
- **IDFA/GAID** — Device advertising IDs (requires ATT consent on iOS)
- **Google Play Install Referrer** — Passes referrer data through the Play Store install process
- **Deep link click IDs** — Unique tokens embedded in deep links

**Probabilistic matching** — When deterministic IDs aren't available:
- **Device fingerprinting** — Matching based on IP address, device model, OS version, screen resolution, and locale
- **Statistical modeling** — Using machine learning to find the most likely match

**Attribution models** determine how credit is assigned:
- **Last-click** — The last touchpoint before install gets full credit (most common)
- **Multi-touch** — Credit is distributed across multiple touchpoints
- **View-through** — Gives partial credit to ad impressions even without a click

## Why it matters

Attribution is the foundation of data-driven mobile marketing:

- **Measure ROI** — Know exactly how much each install costs and how much revenue each channel generates
- **Optimize spend** — Shift budget from underperforming channels to those driving real results
- **Detect fraud** — Identify suspicious install patterns that indicate ad fraud
- **Personalize onboarding** — Tailor the first-time experience based on the acquisition source
- **Prove marketing impact** — Quantify the business value of marketing campaigns to stakeholders

## FAQ

### What is the difference between attribution and analytics?

Attribution answers "where did this user come from?" — connecting installs and events to specific marketing touchpoints. Analytics answers "what is the user doing?" — tracking in-app behavior, engagement, and user flows. Both are essential: attribution measures acquisition effectiveness, analytics measures product effectiveness.

### How does iOS privacy (ATT) affect mobile attribution?

App Tracking Transparency (ATT) requires user consent before accessing the IDFA for attribution. Since most users opt out, iOS attribution increasingly relies on SKAdNetwork for paid campaigns and probabilistic matching (fingerprinting) for organic and owned channels. Platforms like Redirectly use privacy-compliant deferred deep linking for attribution without requiring IDFA.

## Related terms

- [Deferred Deep Linking](https://redirectly.app/glossary/deferred-deep-linking.md)
- [SKAdNetwork](https://redirectly.app/glossary/skadnetwork.md)
- [App Tracking Transparency (ATT)](https://redirectly.app/glossary/app-tracking-transparency.md)
- [Mobile Measurement Partner (MMP)](https://redirectly.app/glossary/mobile-measurement-partner.md)
- [UTM Parameters](https://redirectly.app/glossary/utm-parameters.md)

## Related pages

- [Mobile Install Attribution Guide](https://redirectly.app/blog/mobile-install-attribution-guide.md)
- [UTM Parameters for Mobile Apps](https://redirectly.app/blog/utm-parameters-mobile-apps.md)
- [UTM Builder Tool](https://redirectly.app/tools/utm-builder.md)
- [Branch vs AppsFlyer vs Adjust](https://redirectly.app/blog/branch-vs-appsflyer-vs-adjust.md)

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Full site index for AI agents: https://redirectly.app/llms.txt