This is a summary of the provided text in one paragraph: Flutter and Bitrise are a perfect combination, and this guide will show you how to add a Flutter app to Bitrise. The author, a senior customer engineer at Bitrise, shares their experience with creating a new Flutter app and deploying it to Google Play and Apple App Store using Bitrise. They cover the process of setting up a new Flutter project, adding it to GitHub, and then integrating it with Bitrise. The guide also covers how to set up code signing for iOS and Android, and how to deploy the app to the App Store. Throughout the guide, the author provides step-by-step instructions and screenshots to help readers follow along.