---
title: Map Every Exam Error to the Source That Fixes It — Free
description: Each recurring mistake gets the sources behind it from a numbered key, and the label shows which rows still have nothing behind them — the gaps that cost marks.
category: learning
last_verified: pending
freshness: unverified
published: 2026-09-20
canonical_url: https://gratis-ai.pages.dev/articles/exam-error-source-matrix-label.html
companion_app_url: https://gratis-ai.pages.dev/apps/exam-error-source-matrix-label.html
reading_time_minutes: 5
tags: learning, exams, revision, errors, local-first, no-account
---

# Map Every Exam Error to the Source That Fixes It — Free

Each recurring mistake gets the sources behind it from a numbered key, and the label shows which rows still have nothing behind them — the gaps that cost marks.

**Free and complete.** This guide is a standalone free tool — no account, no card, anywhere. The only paid option is one optional extra outcome: $4 one-time. Nothing in the free tier is gated.

## Who it's for

Anyone seeking practical 100% free AI workflows — no paid API keys, credit cards, or subscriptions

## What's free

- Unlimited source labels with the numbered key and per-row coverage
- Copy the label or the state link to a teacher or a study partner
- Starter, essay-paper and maths-paper records included

## Optional paid add-on

**$4 one-time.**

- Printable error label — the source-mapped list with the key, to pin above the desk or take to a teacher — estimate: ~20 minutes saved per revision session
- Saved error history — keep each mock's label in this browser so errors that clear off the list are visible as progress — estimate: ~20 minutes saved per mock
- Fix order sheet — the gaps first and the sourced rows in order, printed under the label — estimate: ~15 minutes saved per revision week

## Sources & verification

- Tool: GratisAI local-first error source label (no key, no account)
- Primary source: the free tool itself (local-first, no external dependency)
- Last verification: pending (marked unverified, not assumed current)

## Use it

- Interactive guide: https://gratis-ai.pages.dev/articles/exam-error-source-matrix-label.html
- Companion app: https://gratis-ai.pages.dev/apps/exam-error-source-matrix-label.html
- This machine-readable mirror: /mirrors/exam-error-source-matrix-label.md

*Generated free at https://gratis-ai.pages.dev/articles/exam-error-source-matrix-label.html — every guide on GratisAI is a complete, working tool. $0, no account, no card, anywhere.*