Maestro Maestro is the simplest and most effective UI testing framework for Mobile and Web. Why Maestro? Maestro is built on learnings from its predecessors (Appium, Espresso, UIAutomator, XCTest) Built-in tolerance to flakiness. UI elements will not always be where you expect them, screen tap will not always go through, etc. Maestro embraces the instability of mobile applications and devices and tries to counter it. Built-in tolerance to delays. No need to pepper your tests with sleep() calls. ...