SDK Overview - AppDNA

AppDNA provides native SDKs for every major mobile platform. All four SDKs share an identical API surface, the same offline-first architecture, and full feature parity. Choose the SDK that matches your stack and get started in minutes.

Choose Your Platform

iOS

Native Swift SDK distributed via Swift Package Manager and CocoaPods. Requires iOS 15.0+ and Swift 5.9+.

Android

Kotlin SDK distributed via Maven Central (Gradle). Requires Android API 24+ and Kotlin 1.9+.

Flutter

Dart package distributed via pub.dev. Requires Flutter 3.10+ and Dart 3.0+.

React Native

TypeScript package distributed via npm. Requires React Native 0.72+.

Platform Comparison

Requirements

	iOS	Android	Flutter	React Native
Package	`AppDNASDK`	`ai.appdna.sdk`	`appdna_sdk`	`@appdna/react-native-sdk`
Language	Swift 5.9+	Kotlin 1.9+	Dart 3.0+	TypeScript
Min Platform	iOS 15.0	Android API 24	Flutter 3.10+	React Native 0.72+
Distribution	SPM, CocoaPods	Maven Central (Gradle)	pub.dev	npm
Current Version	1.0.0	1.0.0	1.0.0	1.0.0

Dependencies

	iOS	Android	Flutter	React Native
HTTP	URLSession (built-in)	OkHttp3	Platform channels	NativeModules bridge
Billing	StoreKit 2 (built-in)	Google Play Billing 7.0	Platform channels to native	NativeModules bridge
Config Sync	FirebaseFirestore	Firebase Firestore 24.10	Platform channels to native	NativeEventEmitter
Secure Storage	KeychainAccess	EncryptedSharedPreferences	Platform-specific	Platform-specific

Flutter and React Native SDKs bridge to the native iOS and Android implementations under the hood. You do not need to add native dependencies manually — they are bundled with the SDK.

Core API

Every SDK exposes the same five core methods. The API is intentionally minimal — initialize once, identify your user, track events, and the SDK handles the rest.

`configure`

Initialize the SDK with your API key. Call this exactly once at app startup.

iOS
Android
Flutter
React Native

import AppDNASDK

AppDNA.configure(
    apiKey: "adn_live_xxx",
    environment: .production,
    options: AppDNAOptions(logLevel: .debug)
)

import ai.appdna.sdk.AppDNA
import ai.appdna.sdk.AppDNAOptions
import ai.appdna.sdk.Environment

AppDNA.configure(
    context = this,
    apiKey = "adn_live_xxx",
    environment = Environment.PRODUCTION,
    options = AppDNAOptions(logLevel = LogLevel.DEBUG)
)

import 'package:appdna_sdk/appdna_sdk.dart';

await AppDNA.configure(
  "adn_live_xxx",
  environment: AppDNAEnvironment.production,
  options: AppDNAOptions(logLevel: AppDNALogLevel.debug),
);

import { AppDNA } from '@appdna/react-native-sdk';

await AppDNA.configure("adn_live_xxx", "production", {
  logLevel: "debug",
});

`identify`

Link a user identity with optional traits. Traits are merged with previously set values.

iOS
Android
Flutter
React Native

AppDNA.identify(
    userId: "user-123",
    traits: ["plan": "premium", "signup_date": "2025-01-15"]
)

AppDNA.identify(
    userId = "user-123",
    traits = mapOf("plan" to "premium", "signup_date" to "2025-01-15")
)

await AppDNA.identify("user-123", traits: {
  "plan": "premium",
  "signup_date": "2025-01-15",
});

await AppDNA.identify("user-123", {
  plan: "premium",
  signup_date: "2025-01-15",
});

`track`

Record a custom event with optional properties. Events are queued locally and flushed automatically.

iOS
Android
Flutter
React Native

AppDNA.track(
    event: "workout_completed",
    properties: ["duration": 45, "type": "strength"]
)

AppDNA.track(
    event = "workout_completed",
    properties = mapOf("duration" to 45, "type" to "strength")
)

await AppDNA.track("workout_completed", properties: {
  "duration": 45,
  "type": "strength",
});

await AppDNA.track("workout_completed", {
  duration: 45,
  type: "strength",
});

`reset`

Clear the user identity on sign-out. The anonymous ID is preserved so device-level analytics continue uninterrupted.

iOS
Android
Flutter
React Native

AppDNA.reset()

AppDNA.reset()

await AppDNA.reset();

await AppDNA.reset();

`flush`

Force-send all queued events immediately. Useful before the app enters the background.

iOS
Android
Flutter
React Native

AppDNA.flush()

AppDNA.flush()

await AppDNA.flush();

await AppDNA.flush();

Module Namespaces

Beyond the core API, the SDK organizes features into 10 module namespaces. Each namespace is accessed as a property on the AppDNA singleton and operates independently while sharing the core event pipeline, identity state, and configuration layer.

Namespace	Purpose	Example
`push`	Push notification registration and handling	`AppDNA.push.requestPermission()`
`billing`	Subscription status, product fetching, purchases	`AppDNA.billing.getProducts()`
`onboarding`	Server-driven onboarding flow presentation	`AppDNA.onboarding.present()`
`paywall`	Server-driven paywall rendering and events	`AppDNA.paywall.present("premium")`
`remoteConfig`	Key-value remote configuration	`AppDNA.remoteConfig.getString("key")`
`features`	Feature flags and entitlements	`AppDNA.features.isEnabled("dark_mode")`
`experiments`	A/B experiment assignment and exposure tracking	`AppDNA.experiments.getVariant("test")`
`surveys`	In-app survey presentation and response collection	`AppDNA.surveys.present("nps")`
`inAppMessages`	Triggered in-app messaging	`AppDNA.inAppMessages.check()`
`deepLinks`	Deep link routing and deferred deep links	`AppDNA.deepLinks.checkDeferred()`

All 10 namespaces are available on all 4 platforms with identical method signatures.

Delegate and Callback Protocols

Each module that communicates events back to your application uses a delegate or callback pattern. There are 7 delegate protocols shared across all platforms:

Protocol	Key Methods	Used By
`OnboardingDelegate`	Flow started, step completed, flow completed, flow skipped	`onboarding`
`PaywallDelegate`	Presented, dismissed, purchase started, purchase completed	`paywall`
`SurveyDelegate`	Presented, response submitted, dismissed	`surveys`
`InAppMessageDelegate`	Presented, action taken, dismissed	`inAppMessages`
`DeepLinkDelegate`	Link received, deferred link resolved	`deepLinks`
`ExperimentDelegate`	Exposure tracked, variant assigned	`experiments`
`PushNotificationDelegate`	Token received, notification presented, notification opened	`push`

iOS
Android
Flutter
React Native

Implement Swift protocols with default empty methods. Conform to only what you need:

class MyHandler: PaywallDelegate {
    func paywallDidPresent(paywallId: String) { }
    func paywallDidDismiss(paywallId: String, action: PaywallAction) { }
}

AppDNA.paywall.delegate = MyHandler()

Implement Kotlin interfaces with default methods. Override only what you need:

AppDNA.paywall.delegate = object : PaywallDelegate {
    override fun onPaywallPresented(paywallId: String) { }
    override fun onPaywallDismissed(paywallId: String, action: PaywallAction) { }
}

Extend Dart abstract classes:

class MyHandler extends PaywallDelegate {
  @override
  void onPaywallPresented(String paywallId) { }
  @override
  void onPaywallDismissed(String paywallId, PaywallAction action) { }
}

AppDNA.paywall.delegate = MyHandler();

Use event emitter listeners with unsubscribe functions:

const unsub1 = AppDNA.paywall.onPresented((paywallId) => { });
const unsub2 = AppDNA.paywall.onDismissed((paywallId, action) => { });

// Clean up when no longer needed
unsub1();
unsub2();

Architecture

Offline-First Design

All four SDKs share the same offline-first architecture. Your app never crashes or degrades because of a network issue. Configuration priority — the SDK resolves config using a three-tier fallback:

Remote (Firestore real-time sync)
    |
    v  unavailable?
Cached (last successful fetch, persisted on device)
    |
    v  unavailable?
Bundled (appdna-config.json embedded in the app binary)

Event queue — events are persisted to disk, batched, and flushed automatically:

Setting	Default	Description
Flush interval	30 seconds	Time between automatic flushes
Batch size	20 events	Events are flushed when the batch reaches this size
Config TTL	5 minutes	Time before cached config is considered stale

Events survive app restarts and device reboots. They are only removed from the queue after the server acknowledges receipt.

Experiment Bucketing

All SDKs use the same MurmurHash3 algorithm for deterministic experiment assignment:

bucket = MurmurHash3(userId + experimentId + salt) % 100

This guarantees that the same user sees the same variant across all platforms, all sessions, and all app versions — with no server round-trip required.

Config Bundle for CI/CD

Generate a versioned JSON config bundle on the server and embed it in your app binary for zero-latency first launch:

iOS
Android
Flutter
React Native

Add appdna-config.json to your Xcode project as a bundle resource.

Place appdna-config.json in the assets/ directory.

Add appdna-config.json to your assets/ folder and declare it in pubspec.yaml.

Place appdna-config.json in your project root or assets directory.

Feature Parity Matrix

All features are available on all platforms. This matrix confirms full parity across SDKs.

Feature	iOS	Android	Flutter	React Native
Event tracking	Yes	Yes	Yes	Yes
User identification	Yes	Yes	Yes	Yes
Offline event queue	Yes	Yes	Yes	Yes
Remote config	Yes	Yes	Yes	Yes
Feature flags	Yes	Yes	Yes	Yes
A/B experiments	Yes	Yes	Yes	Yes
Push notifications	Yes	Yes	Yes	Yes
Billing / subscriptions	Yes	Yes	Yes	Yes
Server-driven onboarding	Yes	Yes	Yes	Yes
Server-driven paywalls	Yes	Yes	Yes	Yes
In-app messages	Yes	Yes	Yes	Yes
Surveys	Yes	Yes	Yes	Yes
Deep links	Yes	Yes	Yes	Yes
Config bundle embedding	Yes	Yes	Yes	Yes
Consent management	Yes	Yes	Yes	Yes
Deterministic experiments	Yes	Yes	Yes	Yes

Configuration Options

All SDKs accept the same configuration options at initialization:

Option	Type	Default	Description
`flushInterval`	number	`30`	Seconds between automatic event flushes
`batchSize`	number	`20`	Events to batch before flushing
`configTTL`	number	`300`	Seconds before cached config is stale
`logLevel`	enum	`warning`	Console log verbosity: `none`, `error`, `warning`, `info`, `debug`
`billingProvider`	enum	platform default	Billing integration: `storeKit2` (iOS), `playBilling` (Android), `revenueCat`, `none`

Use logLevel: debug during development and logLevel: warning or logLevel: none for production builds.

Environments

Environment	API Base URL	Key Prefix
Production	`https://api.appdna.ai`	`adn_live_`
Sandbox	`https://sandbox-api.appdna.ai`	`adn_test_`

Events, experiments, and configuration are completely isolated between environments. The SDK auto-detects the environment from your API key prefix.

Never ship an app to production with a sandbox API key. Sandbox data is periodically purged and is not included in production analytics.

Next Steps

iOS Installation

Add AppDNA to your Xcode project via SPM or CocoaPods.

Android Installation

Add AppDNA to your Gradle build.

Flutter Installation

Add the appdna_sdk package from pub.dev.

React Native Installation

Install @appdna/react-native-sdk from npm.

For architecture deep dives, see the Core Concepts page. For CI/CD integration with config bundles, see the Config Bundle Guide.

SDKs

​Choose Your Platform

iOS

Android

Flutter

React Native

​Platform Comparison

​Requirements

​Dependencies

​Core API

​configure

​identify

​track

​reset

​flush

​Module Namespaces

​Delegate and Callback Protocols

​Architecture

​Offline-First Design

​Experiment Bucketing

​Config Bundle for CI/CD

​Feature Parity Matrix

​Configuration Options

​Environments

​Next Steps

iOS Installation

Android Installation

Flutter Installation

React Native Installation

Choose Your Platform

Platform Comparison

Requirements

Dependencies

Core API

`configure`

`identify`

`track`

`reset`

`flush`

Module Namespaces

Delegate and Callback Protocols

Architecture

Offline-First Design

Experiment Bucketing

Config Bundle for CI/CD

Feature Parity Matrix

Configuration Options

Environments

Next Steps