Though not popular, Raspberry Pi OS does provide a GUI method for installing and uninstalling applications. It’s the Add/Remove Software tool, introduced in 2016 as a GUI-based method for installing applications.
Unlike the traditional Add/Remove Software tool, Pi-Apps is faster, more reliable as less chance of getting confuse between packages with similar names, and packed with useful features. While designed for Raspberry Pi OS, Pi-Apps works seamlessly with other operating systems like Ubuntu for Raspberry Pi.