A study companion built around one idea: catch the mistake the moment it happens, file it where you'll actually review it, and never get in your way.
Capture is locked to an allow-list — OneNote, your browser, a PDF reader. Switch to email or a chat and errorboard goes dark instantly. It never reads your whole screen.
Two screens? Point it at one, or both. A window has to be focused and on a watched display before a single pixel is read.
An NVIDIA NIM vision model reads each frame and decides whether there's a visible academic mistake — a wrong answer, a bad calculation, a bug, a flawed step.
Each confirmed mistake becomes one entry — the screenshot, a one-line read on what went wrong, and the correct approach — appended to a .docx per subject.
Low-confidence flags and the same mistake twice in a row are skipped, so the log stays a clean revision sheet instead of noise.
No window, no taskbar clutter. Pause, force a capture, set a topic, or open settings from one tray icon — or with a hotkey from anywhere.
Logs are plain files in your Documents folder. On the free tier, frames go only to your own NVIDIA key. No account required, no cloud locker.
errorboard Pro runs detection in the cloud — no NVIDIA key to manage — and syncs your error logs across every machine you study on.
Watch a single mistake travel from your screen to your error log on the home page.
How it works Download