By default, the Insert SDK loads in parallel to the app and may finish loading after the app finishes launching. Therefore, there might be a small delay in the first presentation of an insert with an App Launch trigger.
If you plan to include App Walkthrough inserts, Welcome After Upgrade inserts, or any other inserts that should show on app launch, and you want them to appear before the app finishes launching, use the callback capability of the Insert SDK. This capability allows your app code to be notified when the SDK initialization process is complete, thereby allowing you to proceed in the app after the relevant inserts have been shown at launch.
More information about using the callback capability can be found in the SDK integration instructions. These instructions are available under the SDK tab of the App Details page.