CatchBack is a continuous monitoring and video retro-capture app designed to save moments that have already happened. It runs in the background with an intelligent temporary cache that is continuously overwritten to save space. The system allows for full automation, starting monitoring when the charger is connected or when the app is opened. To save a clip, the user can use the volume buttons, sound detection, or cover the camera lens. It offers support for multiple lenses, 4K resolutions, and dashcam functions such as GPS and speed logging. The user defines the retro-capture time and the cache memory limit, also featuring quick-access widgets and tools to manage and share saved videos.