Keep any window visible with a lightweight floating mirror
Keep a tutorial, chat, or reference pane visible while you work by mirroring any window or a cropped region into a floating always-on-top view. Sumbo, from koprodev, runs on Windows and processes everything locally, so no frames leave your PC. Key controls include adjustable opacity, click-through or mouse-forward modes, profile saving, and global hotkeys. The tool fits power users, gamers, and developers who need a persistent secondary view without switching windows.
What does Sumbo actually do for multitasking?
Sumbo duplicates a selected window or a user-defined screen region into a separate floating window that stays on top of other apps. The mirror can be resized, cropped, and saved as a profile for quick recall. Opacity is adjustable from 10% to 100%, and the mirror can either accept forwarded mouse input or operate in click-through mode so underlying windows remain interactive.
Does it affect system performance during normal use?
The developer describes Sumbo as extremely lightweight, and processing happens locally without network activity. That design lets the mirror run without external uploads. Because rendering is limited to a compact floating window rather than full-screen capture, CPU and GPU load stays modest for typical desktop use. The app also minimizes to the system tray to avoid desktop clutter while running in the background.
Is Sumbo safe to run on a production machine?
Sumbo processes mirrored frames on the local machine and explicitly omits telemetry, which reduces privacy exposure. It does not record or upload screen content, and the source code is open-source on GitHub, providing transparency about what the app writes or transmits. Those facts make it suitable for environments where local-only handling and minimal data exposure are required.
Do I need technical knowledge to set it up and use it?
The interface exposes direct controls for region cropping, opacity, and global shortcuts, which let nontechnical users create a mirror quickly. In addition, profile saving stores regions and settings for repeated use. Advanced options such as mouse forwarding require an explicit choice, so users can stick to click-through mode without changing system input handling.
Sumbo is practical for users who need a persistent secondary view, with one caveat
The app serves power users, streamers, and developers who require a low-footprint floating mirror that keeps reference content visible while they work. Its local-only processing and open-source release support privacy and auditability. One trade-off is that the workflow centers on live mirroring rather than recording or remote sharing, so users who need capture and upload features should look elsewhere.
