Appium

This is a solid foundation for anyone automating mobile app testing with Appium. It covers the essentials: setting up desired capabilities for Android and iOS, locating elements with accessibility IDs and XPath, and writing test scripts in Python or Java. The examples show real login flows with explicit waits, which is what you actually need when you're trying to wrangle flaky mobile tests. The best practices section pushes you toward accessibility IDs over XPath, which is the right call. If you're spinning up Appium tests from scratch or need to remember the WebDriver syntax after six months away from it, this gives you working code to start from.