What happens before the first useful moment?
Read your onboarding as a sequence of decisions.
Name the first useful action
For a notes app, it might be saving the first note. For a budgeting app, it might be seeing a first spending category. Define the action before adding welcome screens. A completed sign-up form does not tell you whether someone understood the app.
Question each question
Walk through the first session and write down what each question enables. Ask for information at the moment it becomes useful. Make skipping possible when the answer is optional, and make the next action clear.
Read the failure paths
Try an empty answer, a denied permission and a failed request. Each state needs a clear next step. The Onboarding and Design specialists can inspect the source and prepare changes; verify the actual sequence on a device before shipping.