If you think about it, what really is required from is the test script. The fact that you must deploy an Appium server somewhere is just an extra feature. If you want to skip this part, you can rely on some web services that have already deployed a whole architecture of Appium servers for your tests. Most of them are online labs and they support Selenium and Appium. In this way, you don’t spend exorbitant amounts of money and you also don’t invest time and effort on new infrastructure.