Pocketglass is a free Android application that allows users to emulate classic Game Boy systems, including Game Boy Advance, Game Boy, and Game Boy Color. With features such as customizable controls, various handheld-inspired skins, and a personal game library, it offers a comprehensive emulation experience. Users can bring their own compatible game files and easily manage their gameplay with automatic saves and save-state slots.

The application supports touch controls as well as Bluetooth and USB gamepads, providing flexibility in how users interact with their games. Additional functionalities like gameplay recording, adjustable display settings, and fast-forward options enhance the user experience. Although the free version contains ads, a premium purchase is available to remove them and unlock enhanced graphics. Overall, Pocketglass is designed to cater to the needs of retro gaming enthusiasts on Android.