Mobile SDKs - PostHog

PostHog provides native mobile SDKs for iOS, Android, React Native, and Flutter with full support for event tracking, feature flags, session replay, and user identification.

Choose Your Platform

iOS

Native Swift/Objective-C SDK

Android

Native Kotlin/Java SDK

React Native

Cross-platform React Native SDK

Flutter

Dart-based Flutter SDK

iOS Integration

Installation
Setup
Usage

CocoaPods
Swift Package Manager

Add PostHog to your Podfile:

Podfile

pod "PostHog", "~> 3.0"

Then run:

pod install

In Xcode, go to File > Add Packages and add:

https://github.com/PostHog/posthog-ios.git

Or add to your Package.swift:

Package.swift

dependencies: [
  .package(
    url: "https://github.com/PostHog/posthog-ios.git", 
    from: "3.0.0"
  )
]

Initialize PostHog in your AppDelegate:

AppDelegate.swift

import Foundation
import PostHog
import UIKit

class AppDelegate: NSObject, UIApplicationDelegate {
    func application(
        _: UIApplication,
        didFinishLaunchingWithOptions _: [UIApplication.LaunchOptionsKey: Any]? = nil
    ) -> Bool {
        let POSTHOG_API_KEY = "<ph_project_token>"
        let POSTHOG_HOST = "<ph_client_api_host>"

        let config = PostHogConfig(apiKey: POSTHOG_API_KEY, host: POSTHOG_HOST)
        PostHogSDK.shared.setup(config)

        return true
    }
}

Capture Events

PostHogSDK.shared.capture(
    "button_clicked",
    properties: [
        "button_name": "signup",
        "screen": "home"
    ]
)

Identify Users

PostHogSDK.shared.identify(
    "user_123",
    userProperties: [
        "email": "[email protected]",
        "plan": "premium"
    ]
)

Feature Flags

if PostHogSDK.shared.isFeatureEnabled("new-feature") {
    // Show new feature
} else {
    // Show old feature
}

// Get variant
let variant = PostHogSDK.shared.getFeatureFlag("experiment-name")

Reset on Logout

PostHogSDK.shared.reset()

Android Integration

Installation
Setup
Usage

Add PostHog to your build.gradle dependencies:

build.gradle

dependencies {
    implementation("com.posthog:posthog-android:3.+")
}

Initialize PostHog in your Application class:

SampleApp.kt

import android.app.Application
import com.posthog.PostHog
import com.posthog.android.PostHogAndroid
import com.posthog.android.PostHogAndroidConfig

class SampleApp : Application() {

    companion object {
        const val POSTHOG_API_KEY = "<ph_project_token>"
        const val POSTHOG_HOST = "<ph_client_api_host>"
    }

    override fun onCreate() {
        super.onCreate()

        val config = PostHogAndroidConfig(
            apiKey = POSTHOG_API_KEY,
            host = POSTHOG_HOST
        )

        PostHogAndroid.setup(this, config)
    }
}

AndroidManifest.xml

<application
    android:name=".SampleApp"
    ...>
</application>

Capture Events

import com.posthog.PostHog

PostHog.capture(
    event = "button_clicked",
    properties = mapOf(
        "button_name" to "signup",
        "screen" to "home"
    )
)

Identify Users

PostHog.identify(
    distinctId = "user_123",
    userProperties = mapOf(
        "email" to "[email protected]",
        "plan" to "premium"
    )
)

Feature Flags

if (PostHog.isFeatureEnabled("new-feature")) {
    // Show new feature
} else {
    // Show old feature
}

// Get variant
val variant = PostHog.getFeatureFlag("experiment-name")

Reset on Logout

PostHog.reset()

React Native Integration

Installation
Setup
Usage

Expo
React Native CLI

npx expo install posthog-react-native expo-file-system expo-application expo-device expo-localization

npm install posthog-react-native @react-native-async-storage/async-storage react-native-device-info react-native-localize

# For iOS
cd ios && pod install

Wrap your app with the PostHogProvider:

App.tsx

import { PostHogProvider } from 'posthog-react-native'

export function App() {
    return (
        <PostHogProvider
            apiKey="<ph_project_token>"
            options={{
                host: "<ph_client_api_host>",
            }}
        >
            <RestOfApp />
        </PostHogProvider>
    )
}

Use the Hook

import { usePostHog } from 'posthog-react-native'

function MyComponent() {
    const posthog = usePostHog()

    const handlePress = () => {
        posthog.capture('button_pressed', {
            button_name: 'signup'
        })
    }

    return <Button onPress={handlePress} title="Sign Up" />
}

Identify Users

const posthog = usePostHog()

posthog.identify('user_123', {
    email: '[email protected]',
    name: 'Jane Doe'
})

Feature Flags

import { useFeatureFlag } from 'posthog-react-native'

function FeatureComponent() {
    const showNewUI = useFeatureFlag('new-ui')

    if (showNewUI) {
        return <NewUI />
    }
    return <OldUI />
}

Flutter Integration

Installation
Platform Setup
Usage

Add to your pubspec.yaml:

pubspec.yaml

dependencies:
  posthog_flutter: ^5.0.0

Then run:

flutter pub get

Android
iOS

Add to AndroidManifest.xml:

android/app/src/main/AndroidManifest.xml

<application>
  <activity>
    [...]
  </activity>
  <meta-data 
    android:name="com.posthog.posthog.API_KEY" 
    android:value="<ph_project_token>" 
  />
  <meta-data 
    android:name="com.posthog.posthog.POSTHOG_HOST" 
    android:value="<ph_client_api_host>" 
  />
  <meta-data 
    android:name="com.posthog.posthog.TRACK_APPLICATION_LIFECYCLE_EVENTS" 
    android:value="true" 
  />
</application>

Update minimum SDK version in build.gradle:

android/app/build.gradle

defaultConfig {
  minSdkVersion 21
  // rest of config
}

Add to Info.plist:

ios/Runner/Info.plist

<dict>
  [...]
  <key>com.posthog.posthog.API_KEY</key>
  <string><ph_project_token></string>
  <key>com.posthog.posthog.POSTHOG_HOST</key>
  <string><ph_client_api_host></string>
  <key>com.posthog.posthog.CAPTURE_APPLICATION_LIFECYCLE_EVENTS</key>
  <true/>
</dict>

Update minimum iOS version in Podfile:

Podfile

platform :ios, '13.0'

Capture Events

import 'package:posthog_flutter/posthog_flutter.dart';

await Posthog().capture(
    eventName: 'button_clicked',
    properties: {
      'button_name': 'signup',
      'screen': 'home'
    }
);

Identify Users

await Posthog().identify(
    userId: 'user_123',
    userProperties: {
      'email': '[email protected]',
      'plan': 'premium'
    }
);

Feature Flags

final isEnabled = await Posthog().isFeatureEnabled('new-feature');

if (isEnabled) {
  // Show new feature
} else {
  // Show old feature
}

// Get variant
final variant = await Posthog().getFeatureFlag('experiment-name');

Screen Tracking

await Posthog().screen(
    screenName: 'HomeScreen',
    properties: {
      'category': 'main'
    }
);

Common Features

All mobile SDKs support these core features:

Automatic Event Capture

App lifecycle events (app opened, backgrounded)
Screen views (automatically tracked)
App crashes and errors

Session Replay

Mobile session replay captures screen recordings, touch interactions, and network activity (where supported).

Mobile session replay is currently in beta. Check the session replay docs for platform availability.

Group Analytics

Track events for organizations or teams:

PostHogSDK.shared.group(
    type: "company",
    key: "company_id_123",
    groupProperties: [
        "name": "Acme Corporation",
        "plan": "enterprise"
    ]
)

Privacy & Compliance

Opt Out

All SDKs support opt-out for privacy compliance:

PostHogSDK.shared.optOut()
PostHogSDK.shared.optIn()  // Re-enable

Data Masking

Configure what data is captured:

let config = PostHogConfig(apiKey: apiKey, host: host)
config.captureScreenViews = false
config.captureElementInteractions = false

Debugging

Enable debug mode to see SDK activity:

let config = PostHogConfig(apiKey: apiKey, host: host)
config.debug = true

Best Practices

Initialize Early: Initialize PostHog as early as possible in your app lifecycle to ensure all events are captured.

Test on Real Devices: Always test on physical devices, not just simulators/emulators, to catch platform-specific issues.

Handle Permissions: Some features (like session replay) may require specific permissions. Handle these gracefully in your app.

Flush on Background: Events are automatically flushed when the app goes to background, but you can manually flush if needed.

Platform-Specific Documentation

iOS SDK

Complete iOS SDK documentation

Android SDK

Complete Android SDK documentation

React Native SDK

Complete React Native documentation

Flutter SDK

Complete Flutter SDK documentation

Next Steps

Feature Flags

Learn about mobile feature flag patterns

Session Replay

Configure mobile session replay

Group Analytics

Track B2B metrics by organization

SDK Overview

Explore all available SDKs

Get Started

Core Products

Data & Infrastructure

Integration

Configuration

​Choose Your Platform

iOS

Android

React Native

Flutter

​iOS Integration

​Capture Events

​Identify Users

​Feature Flags

​Reset on Logout

​Android Integration

​Capture Events

​Identify Users

​Feature Flags

​Reset on Logout

​React Native Integration

​Use the Hook

​Identify Users

​Feature Flags

​Flutter Integration

​Capture Events

​Identify Users

​Feature Flags

​Screen Tracking

​Common Features

​Automatic Event Capture

​Session Replay

​Group Analytics

​Privacy & Compliance

​Opt Out

​Data Masking

​Debugging

​Best Practices

​Platform-Specific Documentation

iOS SDK

Android SDK

React Native SDK

Flutter SDK

​Next Steps

Feature Flags

Session Replay

Group Analytics

SDK Overview

Build docs developers (and LLMs) love

Choose Your Platform

iOS Integration

Capture Events

Identify Users

Feature Flags

Reset on Logout

Android Integration

Capture Events

Identify Users

Feature Flags

Reset on Logout

React Native Integration

Use the Hook

Identify Users

Feature Flags

Flutter Integration

Capture Events

Identify Users

Feature Flags

Screen Tracking

Common Features

Automatic Event Capture

Session Replay

Group Analytics

Privacy & Compliance

Opt Out

Data Masking

Debugging

Best Practices

Platform-Specific Documentation

Next Steps