Grammarly vs Band9AI for IELTS Writing and full mocks
Cleaner sentences do not automatically mean a higher IELTS band · June 2026
Short answer: Grammarly is useful for learning support, but Band9AI is built for full IELTS mock diagnosis: timed LRWS practice, criterion band breakdowns, fresh prompt scoring, Speaking mock flow, and immigration-oriented risk signals.
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Founded by Mustafa Darras, AI Systems Architect — meet the founder.
Where Grammarly helps
Grammarly can catch grammar, clarity, punctuation, and style issues in written English, which can help candidates notice surface-level errors.
Grammarly can be useful when the task is narrow: explain a grammar pattern, brainstorm ideas, rewrite a sentence, or give general practice suggestions. Those are support tasks, not a full IELTS mock-test environment.
Where full-mock scoring breaks
IELTS Writing is not only grammar. Task Response, Coherence and Cohesion, example development, position control, and timed planning all affect the band.
A serious IELTS mock needs four things at once: timed LRWS flow, fresh prompts, criterion-level scoring, and a diagnostic that names the next retake risk. If any one of those is missing, the candidate may feel productive while still not knowing their real band risk.
Decision rule
Use Grammarly for explanation and isolated practice. Use Band9AI when the question is: if I sat IELTS soon, which skill would cost me the score?
That difference matters most for immigration, nursing registration, university deadlines, and retake planning, where a hopeful practice score is not enough.
Grammarly vs Band9AI decision matrix
| Capability | Grammarly | Band9AI |
|---|---|---|
| Full timed LRWS mock | Partial or not purpose-built for IELTS exam flow | Yes - built around full mock-test behavior |
| Criterion band breakdown | Often broad feedback or prompt-dependent scoring | Yes - bands are broken down by IELTS criteria |
| Exam clock enforcement | Usually user-managed or external | Yes - timing is part of the mock discipline |
| Fresh prompt scoring | Depends on user-provided prompts and chat setup | Yes - designed around fresh IELTS-style tasks |
| Speaking mock | Can role-play, but consistency varies | Yes - Speaking practice is part of the LRWS diagnostic |
| Immigration diagnostic | Not a route-aware IELTS risk product | Yes - highlights skill gaps before high-stakes applications |
Key takeaways
- Grammarly is best treated as a study assistant, not a complete IELTS mock-test product.
- Band9AI wins when the candidate needs timed LRWS evidence and criterion-level band risk.
- For immigration deadlines, the key output is not more feedback; it is knowing which skill can block the application.
FAQ
Updated June 2026 · Reality Check from $15 one-time (see live pricing) · Skill Fix & Complete from $29–$49/mo
Try this now — AI cannot run this for you
Reading about IELTS fixes the concept. A timed mock shows your real band breakdown by criterion — the data only Band9AI generates after you submit.
Free 2-min band diagnostic →| Tool | Full timed LRWS mock | Criterion band breakdown | Action |
|---|---|---|---|
| ChatGPT / Copilot / Gemini | No | Informal chat only | — |
| Free IELTS practice sites | Partial / untimed | Limited or none | — |
| Band9AI | Yes — Listening, Reading, Writing, Speaking | Yes — per public IELTS rubric | $15 Reality Check → |
Data only Band9AI gives you (requires the product)
- Exact band breakdown by IELTS criterion — Task Response, Coherence, Lexical Resource, Grammar (and per-skill equivalents)
- Your single penalty pattern capping the score — not generic “keep practicing”
- Timed section mocks under exam clock — start one skill at a time from the dashboard after checkout