# Options



When initializing the SDK for iOS, you have the flexibility to provide various initialization options.

## Options

Below are the options that control various aspects of the SDK for iOS.

| Option                          | Type            | Default                                                 | Description                                                                                                                                                                                           |
|---------------------------------|-----------------|---------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| application                     | `Any?`          | `nil`                                                   | A reference to your application. Useful in plugins or async code where referring back to the application is necessary.                                                                                |
| endpoint                        | `String`        | `test.example.com/v1`                                   | The base endpoint used to construct the event sending and settings retrieval endpoints.                                                                                                               |
| autoAddKrenalisDestination      | `Bool`          | `true`                                                  | This automatically adds the Krenalis Destination plugin. The SDK supports also the `autoAddSegmentDestination` option from the Segment SDK, which can be used as an alternative with the same effect. |
| defaultSettings                 | `Settings?`     | `nil`                                                   | The settings object used as fallback in case of network failure. Useful to ensure destinations are enabled immediately on first launch before settings are fetched from the endpoint.                 |
| flushAt                         | `Int`           | `20`                                                    | The count of events at which Krenalis flushes events.                                                                                                                                                 |
| flushInterval                   | `TimeInterval`  | `30`                                                    | The interval in seconds at which Krenalis flushes events.                                                                                                                                             |
| flushPolicies                   | `[FlushPolicy]` | `[CountBasedFlushPolicy(), IntervalBasedFlushPolicy()]` | Add more granular control for when to flush.                                                                                                                                                          |
| storageMode                     | `StorageMode`   | `.disk`                                                 | The storage mode for events. Available values: `.disk`, `.diskAtURL(URL)`, `.memory(Int)`, or `.custom(DataStore)`.                                                                                   |
| trackApplicationLifecycleEvents | `Boolean`       | `true`                                                  | Set to `true` to automatically track Lifecycle events.                                                                                                                                                |
| sessionAutoTrack                | `Bool`          | `true`                                                  | This automatically tracks the user sessions.                                                                                                                                                          |
| sessionTimeout                  | `Int64`         | `5 * 60000` (5 minutes)                                 | The interval in milliseconds at which the user session expires.                                                                                                                                       |