Integrate in-app reviews (Unity)

This guide describes how to integrate in-app reviews in your app using Unity. There are separate integration guides for if you are using Kotlin or Java or native code.

Unity SDK overview

The Play In-App Review API is part of Play Core SDK family. The API for Unity offers a ReviewManager class to request and launch the flow using the RequestReviewFlow and LaunchReviewFlow methods. After a request is made, your app can check the status of the request using ReviewErrorCode.

Set up your development environment

Download the latest release of Play In-App Review Unity Plugin from Google packages for Unity.

Create the ReviewManager

Create an instance of ReviewManager that handles communication between your app and the API.

// Create instance of ReviewManager
private ReviewManager _reviewManager;
// ...
_reviewManager = new ReviewManager();

Request a ReviewInfo object

Follow the guidance about when to request in-app reviews to determine good points in your app's user flow to prompt the user for a review (for example, after a user dismisses the summary screen at the end of a level in a game). When your app gets close one of these points, use the ReviewManager instance to create an async operation, as shown in the following example:

var requestFlowOperation = _reviewManager.RequestReviewFlow();
yield return requestFlowOperation;
if (requestFlowOperation.Error != ReviewErrorCode.NoError)
    // Log error. For example, using requestFlowOperation.Error.ToString().
    yield break;
_playReviewInfo = requestFlowOperation.GetResult();

If the call is successful, the API returns the PlayReviewInfo object that your app needs to launch the in-app review flow. In the example, the call is made inside a coroutine to perform the async operation (this does not block the Main thread). Because the call is made asynchronously, it might take up to a couple of seconds, so your app should make the call before your app reaches the point in your user flow where you want to show the in-app review.

Launch the in-app review flow

After your app receives the PlayReviewInfo instance, it can launch the in-app review flow. Note that the PlayReviewInfo object is only valid for a limited amount of time, so your app should not wait too long before launching a flow.

var launchFlowOperation = _reviewManager.LaunchReviewFlow(_playReviewInfo);
yield return launchFlowOperation;
_playReviewInfo = null; // Reset the object
if (launchFlowOperation.Error != ReviewErrorCode.NoError)
    // Log error. For example, using requestFlowOperation.Error.ToString().
    yield break;
// The flow has finished. The API does not indicate whether the user
// reviewed or not, or even whether the review dialog was shown. Thus, no
// matter the result, we continue our app flow.

Next steps

Test your app's in-app review flow to verify that your integration is working correctly.