Band9Prep vs TestGlider IELTS (2026): AI Feedback Compared
Band9Prep vs TestGlider IELTS 2026: two AI-native platforms compared. Feedback depth, scoring accuracy, pricing, practice volume, and which gives better value for your prep.
Band9Prep Team
IELTS Preparation Experts
Both Band9Prep and TestGlider are AI-native IELTS platforms. Both score writing against IELTS criteria. The difference is scope: Band9Prep covers all four skills with instant feedback, while TestGlider focuses specifically on AI writing evaluation.
This page covers the real differences, where each one wins, and how to pick.
Quick take: TestGlider is a focused AI writing scorer. Band9Prep is a full IELTS practice platform with AI feedback on writing and speaking. If you only need writing scoring, TestGlider does one thing well. If you need practice reps across all skills with feedback, Band9Prep covers more.
Feature Comparison: Two AI-Native Platforms
| Feature | Band9Prep | TestGlider |
|---|---|---|
| Product type | Full IELTS practice platform | AI writing scorer |
| Writing feedback | Instant AI, criteria-scored, unlimited | AI scoring, focused on writing |
| Speaking feedback | Instant AI on recorded answers | Limited |
| Mock tests | Unlimited full-length, all skills | Writing-focused |
| Listening practice | Yes, full-length | Limited |
| Reading practice | Yes, full-length | Limited |
| Progress tracking | Skill + question-type dashboard | Writing score tracking |
| Pricing model | $9.99/month, cancel anytime | Varies by plan |
| Mobile apps | iOS and Android | Web-based |
| Free start | Free practice, no credit card | Limited free |
TestGlider's Best Features
TestGlider does one thing well: scoring IELTS writing with AI. If your primary need is getting your essays scored against Task Response, Coherence, Lexical Resource, and Grammar, TestGlider provides that in a focused package.
For students who already have a practice platform and want a second opinion on their writing scores, TestGlider serves as a useful supplementary tool.
Where TestGlider Is Limited
TestGlider's scope is narrow. It does not provide full IELTS mock tests across all four skills, it does not offer speaking feedback with recorded answers, and the Listening and Reading practice is limited compared to a full practice platform.
That is fine if writing is your only gap. But most students need practice across multiple skills, and switching between platforms adds friction.
What Band9Prep Adds
Band9Prep covers everything TestGlider does for writing, plus:
- Instant AI feedback on speaking (recorded and scored)
- Full-length mock tests for Listening, Reading, Writing, and Speaking
- Unlimited practice attempts across all question types
- Progress tracking showing improvement over time
- Both Academic and General Training paths
The broader scope means one platform handles your entire prep, not just writing.
TestGlider Is Better When...
TestGlider is the right choice when:
- Writing is your only weak skill and you want a focused scorer
- You already have another platform for Listening/Reading/Speaking
- You want an independent second opinion on writing scores
- You prefer a simpler, writing-only interface
Band9Prep Is Better When...
Band9Prep is the right choice when:
- You need practice across all four skills
- You want instant feedback on both writing and speaking
- You want unlimited attempts with no rationing
- You want progress tracking over time
- You want one platform for your entire prep
Related Resources
- Best IELTS Platforms 2026: Ranked
- Band9Prep vs BandLadder
- Band9Prep vs Magoosh
- Band9Prep vs IELTS Online Tests
- IELTS Platforms Comparison
Frequently Asked Questions
Is TestGlider better than Band9Prep?
TestGlider is focused specifically on AI writing scoring. Band9Prep covers writing and speaking with AI feedback, plus realistic mock tests for all four skills. If you only need writing feedback, TestGlider is focused. If you need full IELTS practice with feedback, Band9Prep is broader.
How accurate is TestGlider AI scoring?
TestGlider uses AI to score writing against IELTS criteria. The accuracy is competitive with other AI scoring platforms. No AI scoring is 100% accurate — treat AI scores as guidance, not final verdicts.
Does TestGlider do speaking feedback?
TestGlider focuses primarily on writing scoring. For speaking feedback with AI on recorded answers, Band9Prep is the stronger option with unlimited speaking attempts scored by AI.
Which is cheaper, Band9Prep or TestGlider?
Band9Prep is $9.99/month with unlimited practice. TestGlider pricing varies by plan. Check testglider.com for current pricing. Band9Prep offers more practice volume per dollar.
Can I use both platforms together?
Yes. Some students use Band9Prep for full mock tests and speaking practice, and TestGlider for an independent second opinion on writing scores. Two AI scoring systems can help you identify patterns.