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AppsFlyer is the leading mobile attribution platform. It tells you exactly which ads, campaigns, and channels drove each install and in-app action — so you know where to invest your marketing budget and where to cut spending. Connecting AppsFlyer to Rey means Rey automatically sends attribution-ready data to AppsFlyer the moment your app goes live, with no additional code required.

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What AppsFlyer Does

AppsFlyer sits at the intersection of your app and your ad networks. When a user sees your ad, taps it, and installs your app, AppsFlyer matches that install to the specific campaign, ad set, and creative that drove it. This lets you calculate the true return on ad spend (ROAS) for every channel — from Meta and Google Ads to TikTok, Apple Search Ads, and beyond.

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Prerequisites

Before connecting AppsFlyer to Rey, make sure you have:
  • An AppsFlyer account with an app registered.
  • Your AppsFlyer Dev Key — find it in the AppsFlyer dashboard under Settings → App Settings → Dev Key Management.
  • Your app submitted to (or registered with) the App Store or Google Play — AppsFlyer attribution requires a real app store listing.

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Connect AppsFlyer to Rey

1

Register your app in AppsFlyer

Log in to your AppsFlyer dashboard and create a new app. Enter your app’s bundle ID (iOS) or package name (Android). AppsFlyer generates a unique Dev Key for your account — this key is shared across all your apps in the same account.
2

Copy your Dev Key

In the AppsFlyer dashboard, go to Settings → App Settings → Dev Key Management and copy your Dev Key. Keep this key private — it authenticates all SDK communication between your app and AppsFlyer.
3

Enter your Dev Key in Rey

In the Rey editor, open the Integrations panel, select AppsFlyer, and paste your Dev Key into the Dev Key field.
4

Save and verify the connection

Click Save. Rey activates the AppsFlyer integration. A green status indicator appears on the AppsFlyer card in the Integrations panel. Rey will begin sending events as soon as your app is opened by a user.

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What Rey Tracks Automatically

Once connected, Rey sends the following events to AppsFlyer without any additional configuration:
EventDescription
app_installFired on first launch after install
first_openFired the first time a user opens the app
screen_viewFired each time a user navigates to a new screen
These three events cover the most critical attribution signals AppsFlyer needs to match installs to campaigns.
AppsFlyer attribution requires your app to be published on the App Store or Google Play. Attribution does not work for apps tested only in the Rey preview environment — install events must originate from a real app store installation.

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Send Custom Events

Beyond automatic events, you can fire custom events from any action in Rey’s Logic tab. Use custom events to track high-value moments specific to your app, such as completing onboarding, making a purchase, or reaching a key feature. To add a custom event:
  1. Select the component you want to track (typically a button) in the Rey editor.
  2. Open the Logic tab in the property toolbar, choose a trigger, and add a Track Event action.
  3. Enter your event name (for example, purchase_completed or sign_up) and any properties you want to include.
Use snake_case for event names and keep them consistent across iOS and Android. AppsFlyer treats Purchase_Completed and purchase_completed as different events, which can split your reporting.

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View Attribution Data

All attribution data — installs by campaign, cost per install, ROAS, in-app event counts — appears in your AppsFlyer dashboard in real time. You don’t need to configure anything in Rey to view reports; the data flows automatically once the integration is active.
Yes. Add your iOS and Android apps as separate apps in AppsFlyer (each gets its own app ID), but they share the same Dev Key. In Rey, enter the same Dev Key regardless of platform — Rey applies it to the correct platform automatically at build time.
Yes. AppsFlyer is fully compliant with Apple’s SKAdNetwork (SKAN) for privacy-preserving attribution on iOS 14.5 and later. Configure your SKAN conversion values in the AppsFlyer dashboard; Rey does not require any changes on your end.