UI testing is a useful tool to verify an app's key features and user interactions. However, Apple's built-in XCTest framework has some limitations, such as being slow and unstable. To make UI tests more stable and easier to work with, developers can use techniques like waiting for elements to appear, writing robust element queries, setting up predictable app states, and visualizing test results using Bitrise's Test Reporting add-on. By employing these strategies, developers can improve the quality and reliability of their UI tests, making them a valuable investment in ensuring their apps function as expected.