running quietly in your system tray

Every mistake,
marked.

errorboard watches only the app you choose, catches the moment you slip, and files it into a tidy error log for that subject. Revision that writes itself — and never interrupts you.

Download for Windows See how it works
1 appwatched at a time — never your whole screen
.docxa Word error log per topic, screenshots embedded
0pop-ups, prompts, or interruptions
the loop

It works while you do

Scroll to watch a single mistake travel from your screen to your error log.

OneNote — Calculus · practice set 4
Solve  2x + 5 = -3
2x + 5 = −3

2x = −3 − 5

x = −4 mistake · −8 ÷ 2 = −4, not −4
screenshot · 22:14:06
Calculus_errors.docx
0 mistakes

Error Log — Calculus

auto-captured · review before your next session
2026-06-14 · 22:14:06
Sign slip when dividing
Fix: −8 ÷ 2 = −4 is right, but 2x = −8 gives x = −4 only after dividing both sides — recheck the subtraction: −3 − 5 = −8.
2026-06-14 · 22:31:40
Dropped a negative factoring
Fix: (x−3)(x+2), not (x+3)(x−2) — check the constant term's sign.
01Watch
02Detect
03Capture
04Log
quiet by design

It sees less than you'd think — on purpose.

01

Only the app you allow

Capture is locked to an allow-list. OneNote, your browser, a PDF reader — whatever you pick. Switch to email or a chat and errorboard goes dark instantly.

02

Only the monitor you pick

Two screens? Point it at one, or both. The window has to be focused and on a watched display before a single pixel is read.

03

Stays on your machine

Logs are plain Word files in your Documents folder. Frames go straight to your own NVIDIA NIM key and nowhere else. No account, no cloud locker.

the artifact

A revision sheet you didn't have to write.

Each slip becomes one entry: the exact screenshot, a one-line read on what went wrong, and the correct approach — grouped into a document per subject.

→Grouped by topicCalculus stays with Calculus. Organic chem with organic chem.
→De-duplicatedThe same mistake twice in a row won't clutter the page.
→Confidence-gatedOnly flags it logs when it's actually sure something's wrong.
Calculus_errors.docx · Documents\errorboard_logs

Error Log — Calculus

2026-06-14 · 22:14:06 · confidence 88%
Sign slip when dividing
Correct approach: −3 − 5 = −8, so 2x = −8 and x = −4. The answer's right; the working skipped a step.
under the hood

Small, native, and out of the way.

NVIDIA NIM
Your own key drives a vision model — swap between Llama 3.2 11B and 90B.
System tray
No window, no taskbar clutter. Pause, capture, or open settings from one icon.
Global hotkeys
Force a capture or pause watching without leaving your work.
One .exe
A single windowless build. Tick a box to start it with Windows.
pricing

One subscription. Every device you study on.

errorboard Pro runs the detection in the cloud — no NVIDIA key to manage — and keeps your error logs synced across machines. Cancel anytime from your account.

demo mode — no Stripe key set, payments are simulated
errorboard Pro
$20
per month, billed monthly
  • Cloud detection — no NVIDIA NIM key required
  • Error logs synced across all your devices
  • Unlimited topics and screenshots
  • Priority model (Llama 3.2 90B vision)
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Stop repeating
the same mistakes.

Free to start. For Windows 10 & 11.

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