Originally published on AppRanker .

You wired up the Google Play In-App Review API, the task completes without an error, and no rating card ever appears. Usually nothing is broken: the card is quota-limited, the API never tells you what happened, and only one of Google's three test methods shows the real flow. This post gives you a working setup for Kotlin, Expo and Flutter, a rule for when to call it, and a table of the usual reasons the card stays hidden.

What the API does (and won't tell you)

The flow is two calls. requestReviewFlow() fetches a ReviewInfo object from Google Play, and launchReviewFlow(activity, reviewInfo) shows a native Play card over your app where the user picks 1 to 5 stars and can add a comment. It runs on Android 5.0 (API 21) and later, including tablets and Google TV, plus ChromeOS, but only where the Google Play Store is installed.

Three facts shape everything else:

You get no result. The completion callback fires whether the user rated, dismissed the card, or never saw it.…