Testing your mobile app against the sea of mobile devices can be daunting. Just testing with the popular devices of the last few years can be cumbersome and expensive. Not to mention the wear and tear on your thumbs with all that tapping and swiping. Wouldn't it be great if you could apply the same skills and practices you've honed implementing unit testing of your app logic to the testing of your UI? I've got great news, you can! We'll explore how you can get started automating all that tapping and swiping today in your existing mobile apps and plan for it moving forward. We'll also see how those tests can be applied to online services with thousands of devices waiting to run your app.