ES-DE Frontend is a paid app that brings all emulators and games into a unified UI, but it does not emulate anything. The most difficult part of the installation process is setting up RetroArch. The app allows for customization with various themes and the addition of Android apps and games through external tools. However, the app lacks touch controls, only works in landscape mode, and requires manual scrolling to access apps, making it less suitable for daily use. Tasker can be used as a workaround to switch the launcher to ES-DE when a controller is attached. Despite its limitations, ES-DE Frontend is recommended for Android-based gaming handhelds.