Short answer: Cathoven is an AI IELTS platform built on a CEFR language-analysis engine, covering all four skills.
It is partly free: the Language Hub tools are free with daily limits and no card, but IELTS scoring, 50+ mock tests and the AI tutor are Premium - from $3 a day or $67.50 a month (as of September 2026). Worth it for vocabulary-level analysis.
Verdict up front: Cathoven is the most linguistically sophisticated AI checker in IELTS prep - criterion-level essay scoring plus CEFR and vocabulary profiling no rival matches. It is an analysis engine more than a complete practice platform, which shapes who should buy it.
Full disclosure: IELTSbiz is our own platform and appears as the recommended alternative below. Cathoven is a genuinely impressive product, and this review describes it strengths-first.
What is Cathoven?
Cathoven is an AI language-analysis company that built its name on tools for language teachers - CEFR level analysis, vocabulary profiling, text adaptation - and has grown an IELTS preparation product on top of that engine.
As of September 2026 the IELTS side covers Writing (Task 1 and Task 2, Academic and General Training), Speaking (all three parts), Reading and Listening, with diagnostic level tests, 50+ mock tests, a study plan and an AI tutor.
Cathoven reports 1.2M+ users and is also an IELTS registration centre for the British Council.
The pedigree shows: where most IELTS checkers produce a band and some comments, Cathoven can also tell you your text sits at B2 on the CEFR scale, profile the sophistication of every word you used, and measure your sentence complexity. It reports its scoring as examiner-aligned and offers a band-improvement guarantee.
Who is Cathoven for?
Two groups get the most from it. Data-minded candidates who want to see under the hood of their own English - exactly which words are B1, which structures repeat - will find analysis here that exists nowhere else in IELTS prep. And teachers preparing IELTS students get diagnostic tooling that was originally built for them.
It is a weaker fit for candidates who want one integrated practice loop across all four skills with progress tracking - the platform's centre of gravity is analysis, and it does not tag your reading mistakes by trap or track a band per question type.
Cathoven features
AI IELTS writing checker
Paste an essay and Cathoven scores it against the four official criteria - Task Achievement/Response, Coherence and Cohesion, Lexical Resource, and Grammatical Range and Accuracy - highlighting grammar, vocabulary and coherence issues in the text.
Full IELTS scoring sits in Premium on the September 2026 pricing page; the free Writing Reviser in the Language Hub is the no-card entry point.
CEFR and vocabulary profiling
The differentiator. Cathoven maps your writing onto the A1-C2 CEFR scale and profiles your vocabulary word by word, answering the question most checkers cannot: is my lexical resource actually at the level I think it is, or am I recycling intermediate words? For diagnosing Lexical Resource specifically, nothing else in this market is as granular.
Score guarantee
Cathoven advertises a Score Guarantee - "improve your Overall Band Score by 1.0 - or get a full refund" - with the conditions in its refund policy (as of September 2026).
That policy also says there are no refunds on unused subscription periods, so read the terms before you count on it; offering a guarantee at all still signals confidence.
Teacher and API tools
The original teacher toolkit lives on as the Language Hub - CEFR Checker, Level Adaptor, Readability Checker, Reading Generator, Writing Reviser and Video Analyzer - plus enterprise APIs. The CEFR text analysis, Level Adaptor, Reading Generator and Writing Reviser are free with daily limits, which is the part of Cathoven anyone can use without paying.
Is Cathoven free or paid?
Both. Free, with no credit card: the Language Hub tools, within daily limits. Paid (Premium): the full IELTS preparation - diagnostic level tests, Writing and Speaking scored against the official criteria, 50+ mock tests, a personalised study plan and the AI tutor.
Cathoven's own writing-checker guide (last updated August 2025) describes 3 free Writing Checker evaluations a month, but its September 2026 pricing page lists IELTS scoring under Premium, so check the app for the current free allowance before relying on it.
Does Cathoven have a free trial?
Not a time-limited one: its pricing page lists no free-trial period as of September 2026. The cheapest way to try Premium is the pay-per-day pass at $3 for a day, and the monthly plan can be cancelled anytime.
If you only want to see how its CEFR analysis reads your writing, the free Language Hub tools answer that without paying.
Cathoven pricing (as of 2026)
| Plan | Price (USD, as of September 2026) | Notes |
|---|---|---|
| Free | $0 | Language Hub tools with daily limits, no card required |
| Premium, pay per day | $3 per day | Buy only the days you need; up to 45% off longer plans |
| Weekly Premium | $21.00/week | Billed weekly, cancel anytime |
| Monthly Premium | $67.50/month | Shown discounted from $90.00; billed monthly, cancel anytime |
| 3-Month Premium | $172.80 one-off | Shown discounted from $270.00; one-time payment |
Every Premium plan unlocks the same features; you are choosing a billing length. Cathoven shows region-specific pricing in some markets (the Philippines has its own pricing page) and changes promotions, so check its pricing page before you buy. App-store prices can differ from the web.
Cathoven pros and cons
Pros
- Criterion-level AI essay scoring with in-text highlighting
- CEFR and vocabulary profiling no other IELTS tool matches
- Free Language Hub tools with no card required
- All four skills covered, with 50+ mock tests in Premium
- Flexible billing - a $3 day pass up to a 3-month plan (as of September 2026)
- Band-improvement guarantee
- Strong toolkit for teachers, including APIs
Cons
- Feedback leans linguistic-metric more than band-descriptor language in places
- IELTS scoring, mock tests and the AI tutor all sit behind Premium
- Monthly Premium is $67.50 as of September 2026, so budget buyers get more from short bursts on the day pass
- No trap-level feedback on reading questions or per-question-type band tracking
Verdict: 8/10
Cathoven earns an 8/10 as the best linguistic-analysis tool in IELTS preparation. If your question is "what level is my English, precisely, and which words are holding my Lexical Resource down?", Cathoven answers it better than anyone.
The missing points are about the rest of the loop. IELTS preparation is four skills, and improvement depends on a feedback cycle across all of them - especially reading, where marks are lost to specific traps in specific question types. An analysis engine, however sharp, is one instrument rather than the whole cockpit.
The best alternative: IELTSbiz
For the complete measured-practice loop, IELTSbiz is the stronger overall pick. Full disclosure again: it is our own platform - the free tier lets you verify every claim here yourself.
The IELTSbiz Writing Checker covers the same core job - all four criteria scored per essay with sentence-level notes - and every correction quotes the sentence it is about, so you can check the feedback against your own essay (how we check our marking).
Around the checker sits what an analysis engine lacks: Cambridge-style generated reading passages by question type with trap-level feedback on every wrong answer, an estimated band tracked per question type, a daily Word Coach for vocabulary, and Listening and Speaking practice marked to a band.
One platform, one progress picture. Free to start, then from $7.99/month or $50 lifetime (pricing).
Cathoven vs IELTSbiz at a glance
| Cathoven | IELTSbiz | |
|---|---|---|
| Price | Free Language Hub; Premium $3/day, $21/week, $67.50/month or $172.80 for 3 months (as of September 2026) | Free to start; from $7.99/month or $50 lifetime |
| Writing feedback | Four criteria plus CEFR and vocabulary profiling (Premium) | Four criteria, each correction quoting your own sentence |
| Reading practice | IELTS-format practice and mock tests (Premium) | Unlimited generated passages with trap-level feedback |
| Band tracking | Progress tracking toward your target score | Estimated band per question type over time |
| Free tier | Language Hub tools with daily limits, no card | Every paper free within a monthly allowance, no card |
The two also pair well: candidates fascinated by their own vocabulary data can run occasional Cathoven deep dives while IELTSbiz handles the daily practice loop.
Our Cathoven alternative page compares the two directly, and the wider roundups of the best IELTS writing checker tools and best AI tools for IELTS place Cathoven in its full competitive field.