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SDK Size Optimization

Reduce mobile app binary size when integrating Zoom Meeting SDK or Video SDK on iOS and Android.

Overview

Zoom SDKs add significant size to mobile apps. This guide covers Zoom-recommended techniques from the official developer forum and blog to minimize the impact on your app's download size.

Skills Needed

zoom-meeting-sdk (iOS, Android)
zoom-video-sdk (iOS, Android)

SDK Size Reference

Meeting SDK

Platform	Configuration	Size
iOS	Universal (all architectures)	~107 MB
Android	arm64-v8a + armeabi-v7a	~97-108 MB
Android	arm64-v8a only	~71 MB
Android	armeabi-v7a only	~47 MB

Video SDK

Platform	Size
iOS/Android	~75 MB

Android: Zoom-Recommended Methods

1. ABI Filtering (Official Recommendation)

This is the primary method recommended by Zoom to reduce APK size. Filter to only the CPU architectures you need.

// build.gradle (app module)
android {
    defaultConfig {
        ndk {
            // Option 1: Modern devices only (smallest size)
            abiFilters 'arm64-v8a'
            
            // Option 2: Broader device support
            // abiFilters 'arm64-v8a', 'armeabi-v7a'
        }
    }
}

Size Impact (from Zoom Dev Forum):

Configuration	APK Size
No Zoom SDK	~11 MB
arm64-v8a + armeabi-v7a	~97 MB
arm64-v8a only	~71 MB
armeabi-v7a only	~47 MB

Note: Most modern Android devices (2017+) use arm64-v8a. Only include armeabi-v7a if you need to support older 32-bit devices.

2. Android App Bundle (AAB)

Use Android App Bundles for Play Store distribution. Google Play automatically generates device-specific APKs:

android {
    bundle {
        abi {
            enableSplit = true
        }
    }
}

Users only download the architecture matching their device, reducing download size.

iOS: Zoom-Recommended Methods

App Store App Thinning (Automatic)

iOS App Store automatically applies App Thinning:

Delivers only the architecture slice needed for each device
No manual configuration required
Happens automatically when distributing through App Store

Verify in Xcode: Window → Organizer → Archives → App Thinning Report

What Does NOT Work

Zoom has confirmed the following approaches are NOT supported:

No Feature/Module Exclusion

From Zoom Developer Forum (August 2024):

"There are no new updates regarding reducing size of SDK"

Cannot remove virtual background module
Cannot remove screen sharing module
Cannot exclude any bundled features
All features are compiled together

No Dynamic Feature Module Support

Zoom has confirmed they do NOT support Android Dynamic Feature Modules:

Resource linking errors occur
Resources$NotFoundException at runtime
Community workarounds are unsupported and may break

ProGuard/R8 Not Fully Supported

Warning: ProGuard/R8 causes crashes with Zoom SDK, even with Zoom's provided rules. Users report runtime crashes. Use at your own risk.

Bitcode Not Supported (iOS)

Zoom SDK does NOT support iOS Bitcode due to internal dependencies. However, Bitcode is no longer required by Apple (Xcode 15+).

Alternative Approaches

If SDK size is prohibitive for your use case:

1. Web SDK in WebView

Load the Web SDK in a native WebView instead of using the native SDK:

// iOS
let webView = WKWebView(frame: view.bounds)
webView.load(URLRequest(url: URL(string: "https://your-app.com/zoom-meeting")!))

// Android
webView.loadUrl("https://your-app.com/zoom-meeting")

Trade-offs:

No native SDK size impact
Reduced native feature access
Requires WebView setup and web hosting

2. Deep Link to Zoom App

Open meetings in the native Zoom app instead of embedding:

// iOS
if let url = URL(string: "zoomus://zoom.us/join?confno=\(meetingNumber)") {
    UIApplication.shared.open(url)
}

// Android
val intent = Intent(Intent.ACTION_VIEW, 
    Uri.parse("zoomus://zoom.us/join?confno=$meetingNumber"))
startActivity(intent)