Although Termux is compatible with a wide range of Android devices, running it on Android 4.x (also known as KitKat) requires some additional setup. Android 4.x was released in 2013 and is still used on many devices today. While Termux can run on Android 4.x, it requires a minimum version of 4.4 (KitKat) and a device with a compatible processor architecture (e.g., ARM, x86).