WingifyGuides

Storage Service

Updated View original on help.wingify.com ↗

Mobile SDKs for Feature Experimentation are designed to operate efficiently on Flutter applications. Mobile SDKs utilize built-in storage to manage feature flags and experimentation data.

#Purpose of Storage

The primary purpose of using storage in mobile SDKs is to enhance performance and ensure a consistent user experience. By caching feature flag decisions locally, mobile applications can quickly access necessary data without repeatedly querying the server.

#Key Benefits

  • Consistent User Experience: Persisting feature flag decisions ensures that users have a consistent experience, even if they close and reopen the app.
  • Decision Stability: Once a decision is made for a user, it remains consistent, even if campaign settings are modified. This stability is crucial for accurate A/B testing and controlled feature rollouts.
  • Performance Improvement: Caching decisions locally reduces the need for constant server communication, leading to faster response times and a smoother user experience.

#Implementation in Flutter

The Wingify Flutter SDK implements storage through platform-specific mechanisms, such as SharedPreferences for Android and UserDefaults for iOS. This provides a reliable, persistent key-value store that survives app restarts and updates.

#Storage Configuration

To enable proper storage functionality in the Wingify Flutter SDK, you do not need to provide any external storage parameter during initialization:

#Example

import 'package:wingify_fme_flutter_sdk/wingify.dart';
import 'package:wingify_fme_flutter_sdk/wingify/models/wingify_init_options.dart';

final wingifyInitOptions = WingifyInitOptions(
  sdkKey: 'YOUR_SDK_KEY',
  accountId: YOUR_ACCOUNT_ID,
);

// Initialize the SDK
final wingifyClient = await Wingify.init(wingifyInitOptions);

#Important Notes

  • Feature flag decisions are stored persistently, ensuring consistent user experiences across app launches.
  • The SDK automatically handles caching and retrieval of user decisions without requiring additional configuration.