Replace AppsFlyer: smaller app

Q: How much do these SDKs typically add to my binary?

Varies by SDK. Rough order of magnitude on Android (release AAB): Firebase Analytics ~3-4 MB (with transitive Google Play Services), AppsFlyer ~1-2 MB, Branch ~1.5 MB, Mixpanel ~1 MB. Our [SDK Bundle-Size Comparator](/tools/sdk-bundle-size-comparator/) has up-to-date numbers per SDK.

Q: Does binary size actually affect downloads?

Yes — particularly past Apple's 200 MB cellular-download cap and on lower-end Android devices with limited storage. Google's Play Console has internal metrics showing measurable install-rate differences when AAB size crosses common thresholds (50 MB, 100 MB).

Q: How does the size reduction work in practice?

Removing a single ~3 MB SDK from your release build shrinks the binary by roughly that amount. Multiplied by user installs, the cellular-data savings compound. iOS App Thinning handles per-device variants; Android AAB delivers size-optimised installs by ABI / density / language.

Q: Does the smaller SDK come at a feature cost?

Respectlytics intentionally doesn't bundle features it considers separate concerns: no ads, no attribution, no in-app messaging, no A/B testing, no crash reporting. Each of those is a dedicated tool's job. The smaller surface is the deliberate design — you add only what you actually use.

▸Example AppsFlyer call (the "before")

swift Respectlytics

import AppsFlyerLib

// ATT prompt path — required before AppsFlyer reads IDFA:
ATTrackingManager.requestTrackingAuthorization { _ in
    AppsFlyerLib.shared().start()
    AppsFlyerLib.shared().logEvent("af_purchase", withValues: [
        AFEventParamRevenue: price,
        AFEventParamCurrency: "USD",
        AFEventParamContentId: sku,
    ])
}

App-binary size affects download conversion (especially on lower-end devices and cellular networks) and storage pressure for users with full phones. Heavy analytics SDKs (Firebase Analytics, AppsFlyer, Branch) routinely add several MB to the binary; Respectlytics's per-platform SDK is under 100 KB.

☑Remove AppsFlyer cleanly

1
Remove the AppsFlyer SDK from your build (AppsFlyerFramework / af-android-sdk / react-native-appsflyer / appsflyer_sdk)
2
Remove AppsFlyerLib.shared().start() and logEvent(...) call sites
3
Re-check your Info.plist for NSUserTrackingUsageDescription — if no other SDK needs ATT, remove it (Apple flags apps that ship the key without code that calls ATTrackingManager)
4
Re-check your Android merged manifest for com.google.android.gms.permission.AD_ID and remove the corresponding <uses-permission> if no other SDK contributes it
5
Plan how you'll attribute installs without AppsFlyer — Apple SKAdNetwork + Google Play Install Referrer (both first-party, no SDK needed) cover most cases

⇋AppsFlyer vs Respectlytics — smaller app binary

	AppsFlyer	Respectlytics
Typical contribution to IPA size	— see tool note above	< 100 KB
Typical contribution to APK / AAB size	— see tool note above	< 100 KB
Transitive dependencies	— see tool note above	None (zero third-party)

❓Frequently asked questions

How much do these SDKs typically add to my binary?

Varies by SDK. Rough order of magnitude on Android (release AAB): Firebase Analytics ~3-4 MB (with transitive Google Play Services), AppsFlyer ~1-2 MB, Branch ~1.5 MB, Mixpanel ~1 MB. Our [SDK Bundle-Size Comparator](/tools/sdk-bundle-size-comparator/) has up-to-date numbers per SDK.

Does binary size actually affect downloads?