It's very important to test the UI of your app but it's very stressful when testing it manually. Firebase Test Lab has made it easy to test your app's UI online - it will get the results, screenshots, and performance of your app's UI but it is not an automated process. With Bitrise, you can automate the whole process so that by just pushing your app to Github, Bitbucket, or Gitlab, Bitrise will automatically test the UI of your project with Firebase Test Lab Step.