Kotlin SDK for App Install Tracking
Attribr provides a lightweight Kotlin SDK that tracks which source drove each app install on Android. Integrate in 3 lines of code, with no third-party dependencies and less than 50ms launch overhead.
What the Attribr Kotlin SDK does
Attribr's Kotlin SDK is built for indie Android developers who need install attribution without enterprise pricing. It tracks the source of each install (link, campaign, channel) and monitors whether users open your app at day 7, 14, and 30 after installation. The SDK is just 50KB, requires zero external dependencies, and adds less than 50ms to your app launch time. You can see all attribution data in your web dashboard and export it for analysis or integration with your own backend.
Integration is simple
The Kotlin SDK integrates in approximately 3 lines of code. Add the dependency to your build.gradle file, initialise Attribr in your main activity or application class, and start tracking. No configuration of third-party services required, no API keys scattered across your codebase. Attribr handles the rest: device fingerprinting, install source matching, and retention tracking happen automatically in the background without slowing down your app startup.
How install source attribution works
When a user installs your app from a link (email campaign, social post, organic search result, paid ad), Attribr matches that device to the install event in your dashboard. You see exactly which marketing channel, campaign, or link drove the installation. This matters because you can then measure which channels actually bring engaged users versus one-time downloaders. Retention cohorts show you which install sources produce day 7, day 14, and day 30 openers so you can focus marketing spend on what actually works.
Free for indie developers
Attribr is free for indie developers and small studios. Pricing scales only if your monthly tracked install volume grows beyond the indie tier. This is the opposite of Branch, AppsFlyer, or Adjust, which require enterprise contracts from the start. Attribr was built specifically for developers who would otherwise pay thousands per month but don't have that budget. You get the same core insight: which source drove each install and which users stick around.
No ATT permission required on iOS
If you also develop for iOS, Attribr works on iOS 14.5 and later without requiring App Tracking Transparency permission. This means you can track install attribution on both iOS and Android without asking users for permission or losing visibility when users decline. Your Kotlin SDK on Android integrates the same way: quick setup, no dependencies, low overhead.
Get started
Visit attribr.dev to grab the Kotlin SDK documentation, see code examples, and create your free account. You'll get access to the web dashboard, API reference, and integration guides for both Android and iOS. If you also want to track in-app events or user cohorts, Attribr's lightweight approach keeps your app fast while giving you the data you need to grow.
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Frequently asked questions
Is Attribr's Kotlin SDK open source?
Attribr's SDK is proprietary, but the integration is straightforward and well documented. You have full control over your data and can export attribution reports via the dashboard or API.
Does the Kotlin SDK work on older Android versions?
Attribr supports modern Android versions through its standard Kotlin SDK. Check the documentation at attribr.dev for the minimum API level and any version-specific considerations.
Can I use Attribr for both Android and iOS?
Yes. Attribr provides both Kotlin (Android) and Swift (iOS) SDKs. Both are equally lightweight and integrate in roughly 3 lines of code. Install data is unified in one dashboard.
How accurate is the install attribution?
Attribr uses device fingerprinting to match installs to sources. Accuracy depends on device signals available and whether users are coming through attribution links. See attribr.dev for details on methodology.
What happens when the free tier is exceeded?
Attribr is free for indie developers. If your monthly tracked installs grow, pricing scales based on volume. You're notified in advance and can choose to upgrade or stay on the free tier.
Can I see retention cohorts in real time?
Yes. The Attribr dashboard tracks day 7, 14, and 30 retention cohorts by install source in real time. You can slice data by campaign, channel, or link to see which sources bring engaged users.