Methodology
How IELTS Writing AI evaluates essays
This page explains how the tool turns an essay into criterion-based diagnostic feedback, what the score estimate means, and where the limits are.
Not an official IELTS service
We are not affiliated with IELTS, the British Council, IDP, or Cambridge English. Band estimates produced by this tool are diagnostic indicators for self-review, not official scores. Only the official IELTS test can assign an examined Band.
4 criteria
Every report maps to TR, CC, LR, and GRA
1 next fix
The output prioritizes the first score-moving revision
+/-0.5
Band direction is designed to stay useful for revision decisions
How the scoring signal is built
The goal is not to imitate generic correction tools. The workflow is designed to answer a harder question: which IELTS criterion is actually limiting this draft right now?
1. Prompt and essay intake
The system checks the essay type, task intent, and response length before producing any score explanation. This prevents grammar-only feedback from being mistaken for IELTS scoring.
2. Four-criteria diagnosis
Feedback is organized around Task Response, Coherence and Cohesion, Lexical Resource, and Grammatical Range and Accuracy so users can see where band loss is concentrated.
3. Sentence and pattern review
The tool looks for repeated weaknesses such as missing overview statements, weak idea support, repetitive vocabulary, and unstable grammar control in comparative or complex sentences.
4. Actionable revision output
The goal is not only to describe what is wrong, but to show what should be fixed next. Higher-value plans expose more criterion evidence, rewrites, and repeat-use workflows.
Free diagnosis
Shows the likely band direction, the weakest criterion, and the main reason this draft is being held back.
Deeper feedback
Adds more criterion evidence, clearer rewrite direction, and a more repeatable study workflow across multiple essays.
What the free diagnosis shows
The free diagnosis shows estimated band direction, weakest criterion, and the main blockers in the current essay. Paid reports add sentence-level evidence, rewrite guidance, and deeper multi-draft tracking.
Methodology limits
- The product is a diagnostic and revision tool, not a replacement for the official IELTS exam.
- Band estimates are intended to reveal likely bottlenecks, not to guarantee an official score.
- Users should compare multiple essays over time instead of treating one draft as a final prediction.
See the methodology in the product
If you want to understand this process faster, run a real draft through the checker and compare the weakest-criterion callout with the sections above.