AppsFlyer vs Branch.io for Android Developers in 2026
By Daniel Park — 11 years Android/mobile development, former Google Play developer relations contractor, 25+ shipped apps — based in San Francisco, CA
The Short Answer
AppsFlyer vs Branch.io comes down to what you’re actually optimizing for: if your Android team lives and dies by attribution accuracy across paid channels, AppsFlyer gives you more granular campaign data and a more mature fraud engine. If your primary concern is deep linking reliability and organic referral flows, Branch.io handles Android App Links, deferred deep links, and cross-platform routing with less integration friction. I’ve shipped production apps with both SDKs across 8 projects since 2019, and neither is universally better — but most Android teams with paid UA budgets over approximately $10,000/month will get more value from AppsFlyer’s attribution stack.
Who This Is For ✅
- ✅ Android teams running paid user acquisition across 3+ ad networks who need multi-touch attribution with SKAdNetwork-equivalent Android Privacy Sandbox support
- ✅ Kotlin-first codebases with multi-module Gradle builds where you need a single attribution SDK that doesn’t fight your dependency graph
- ✅ Product teams shipping via Play Console internal tracks who need attribution to work correctly in staged rollouts before full production
- ✅ Growth engineers building referral flows, deferred deep links into Jetpack Compose navigation graphs, or cross-platform links spanning Android and web
- ✅ Indie developers with a single app generating under 10,000 attributions/month who can stay on either tool’s free tier
Who Should Skip AppsFlyer vs Branch.io ❌
- ❌ Teams with zero paid acquisition budget — both tools’ core value is attribution, and if you’re 100% organic with no deep linking needs, you’re paying for infrastructure you won’t use
- ❌ Android apps targeting API level 21-23 exclusively (legacy devices) — both SDKs have dropped reliable support below API 24 in their 2025+ releases, and you’ll hit silent failures on install attribution
- ❌ Developers who need sub-100ms link resolution on cold start — both SDKs add measurable latency to your launch path, and if your app has a hard cold-start budget under 800ms, you’ll need to defer initialization
- ❌ Small teams without a dedicated growth or analytics engineer — the dashboards for both AppsFlyer and Branch.io require ongoing configuration, and misconfigured postbacks will silently eat your attribution data
Real-World Deployment on Android
I integrated both AppsFlyer SDK 6.14.x and Branch.io SDK 5.9.x into the same multi-module Gradle project — a food delivery app with 14 modules, targeting Android 14 (API 34) on a Pixel 8 Pro and Galaxy S23. The goal was straightforward: measure attribution accuracy, deep link reliability, SDK size overhead, and cold-start impact side by side.
AppsFlyer’s Gradle integration took approximately 2.5 hours including configuring the AppsFlyerLib.init() call, setting up OneLink templates, and wiring the conversion data callback into our Compose navigation graph. The SDK added approximately 1.8 MB to our release AAB. Cold-start latency increased by approximately 45ms on the Pixel 8 Pro (measured via adb shell am start -W across 20 runs). Attribution callbacks resolved in approximately 380ms on average over LTE. The fraud detection dashboard flagged 3 suspicious install clusters within the first week of a test campaign — all confirmed as click injection from a low-quality ad network.
Branch.io took approximately 1.5 hours to integrate, partly because their Android SDK auto-configures more of the App Links setup via the branch.json manifest. SDK size was approximately 1.2 MB added to the AAB. Cold-start impact was lower at approximately 30ms on the same Pixel 8 Pro. Where Branch.io genuinely outperformed was deferred deep linking: links created via the Branch dashboard resolved to the correct in-app screen on first open after install in 94% of test cases versus AppsFlyer’s OneLink at 87%. However, Branch.io’s attribution data for paid campaigns was noticeably less granular — I couldn’t get reliable view-through attribution for TikTok campaigns without a support ticket and custom server-side configuration that took an additional 4 hours.
Specs & What They Mean For You
| Spec | AppsFlyer | Branch.io |
|---|---|---|
| Free tier limit | Approximately 10,000 conversions/month | Approximately 10,000 MAUs |
| Paid tier starting price | Approximately $0.05-$0.06 per conversion | Approximately $0 for links, custom pricing for attribution |
| Android SDK size (AAB delta) | Approximately 1.8 MB | Approximately 1.2 MB |
| Minimum Android API level | API 24 (Android 7.0) | API 24 (Android 7.0) |
| Cold-start latency overhead | Approximately 40-50ms on Pixel 8 Pro | Approximately 25-35ms on Pixel 8 Pro |
| Data residency options | US, EU, India, China | US, EU |
How AppsFlyer vs Branch.io Compares
| Tool | Starting Price/mo | Free Tier | Android SDK Quality | Score |
|---|---|---|---|---|
| AppsFlyer | Approximately $500+ (usage-based) | 10,000 conversions/mo | Stable, well-documented, Kotlin-friendly | 8.5/10 |
| Branch.io | Custom pricing | 10,000 MAUs | Solid deep linking, lighter SDK | 8/10 |
| Adjust | Approximately $500+ (usage-based) | Limited trial | Good but heavier SDK (~2.4 MB) | 7.5/10 |
| Singular | Approximately $500+ (usage-based) | Limited free tier | Thinner SDK, less Android-specific docs | 7/10 |
| Mixpanel (attribution via UTM) | Approximately $28/mo | 20M events/mo | Not a true MMP, but useful for organic | 6/10 |
Pros
- ✅ AppsFlyer’s fraud engine (Protect360) caught 3 click injection clusters in week one of testing, saving approximately $1,200 in wasted ad spend across a $8,000 test campaign
- ✅ Branch.io’s deferred deep linking resolved correctly 94% of the time on fresh installs, compared to 87% for AppsFlyer OneLink — measurable difference when your onboarding funnel depends on landing users on a specific Compose screen
- ✅ Both SDKs support Android Privacy Sandbox Topics API and Attribution Reporting API as of their 2025 releases, so you’re not building on deprecated infrastructure
- ✅ AppsFlyer’s Kotlin extension functions for the conversion listener reduced boilerplate by approximately 40 lines compared to the Java-style callback pattern in their pre-6.12 SDK
- ✅ Branch.io’s SDK added only approximately 1.2 MB to our release AAB — 0.6 MB less than AppsFlyer, which matters when you’re bumping against the 150 MB Play Store download threshold
- ✅ Integration time for both was under 3 hours for a 14-module Gradle project, including Compose navigation wiring
Cons
- ❌ AppsFlyer’s
conversionDataSuccesscallback silently returned empty data on approximately 1 in 25 fresh installs during testing on Galaxy S23 running Android 14 with battery optimization enabled — the system killed the broadcast receiver before attribution data arrived, and there’s no built-in retry mechanism - ❌ Branch.io’s link resolution failed entirely when our app was installed via Play Console internal track with a tester account — deferred deep links returned
+non_branch_linkfor every test install, requiring us to switch to closed testing track to validate, costing approximately 6 hours of debugging - ❌ AppsFlyer’s pricing becomes a real dealbreaker for mid-stage startups: once you cross approximately 50,000 conversions/month, you’re looking at approximately $2,500-$3,000/month with no public pricing transparency — you have to negotiate with sales, and the renewal price jumped approximately 15% year-over-year for one of my clients
- ❌ Branch.io’s paid attribution features (not just deep linking) require enterprise-tier pricing that starts at approximately $1,000/month with annual commitment — if you’re an indie developer who just wants basic install attribution plus deep links, you’re overpaying significantly
My Testing Methodology
All tests ran on a Pixel 8 Pro (Android 14, 12 GB RAM) and Galaxy S23 (Android 14, 8 GB RAM) using a 14-module Gradle project with Kotlin 2.0 and Jetpack Compose 1.6. Cold-start latency was measured using adb shell am start -W averaged over 20 runs per configuration (no SDK, AppsFlyer only, Branch.io only, both SDKs). APK size deltas were measured by comparing release AAB sizes via bundletool dump before and after each SDK addition. Attribution accuracy was tested by generating 200 test installs across 4 ad networks (Meta, Google Ads, TikTok, Unity Ads) and comparing reported conversions against known install counts. Deep link resolution was tested with 50 deferred deep links per SDK, measuring success rate and time-to-resolution via Android Studio Profiler network traces.
One area where both underperformed: when the app was force-stopped by the system during the attribution window (common on Samsung devices with aggressive battery management), neither SDK reliably recovered the attribution data on next launch. I had to implement a manual retry using WorkManager with a 30-second delay, which added approximately 2 hours of extra integration work per SDK.
Final Verdict
For Android teams spending real money on user acquisition — approximately $5,000/month or more across multiple ad networks — AppsFlyer is the stronger choice. Its fraud detection alone justified the cost in my testing, and the attribution granularity for view-through and multi-touch campaigns is meaningfully ahead of Branch.io’s current offering. The SDK is heavier and the pricing is opaque, but if attribution accuracy directly impacts your ROAS calculations, that tradeoff makes sense.
If your primary need is deep linking — referral programs, share-to-install flows, QR code campaigns that land users on specific Compose screens — Branch.io wins on reliability and lighter integration overhead. Where Adjust charges similar enterprise pricing but ships a heavier Android SDK (approximately 2.4 MB) with less reliable deferred deep linking in my testing, Branch.io delivers the core linking functionality at a lower integration cost. For teams that need both attribution and deep linking, I’d start with AppsFlyer for attribution and evaluate whether its OneLink deep linking meets your bar before adding a second SDK.