In short: FluentPrep and TOEFLAIR both flag the specific sentence. TOEFLAIR is the only one of the five where we found the redo saved and graded against your original attempt, and only on Listen and Repeat. PrepEx AI, LingoLeap, and ETS TOEFL TestReady document dimension-level scoring and no targeted redo. FluentPrep is the one tool here we ran ourselves, in August 2026; the other four were checked against their own sites in July.
Nine TOEFL AI tools claim to give you feedback. We read what each one’s own website actually says, rather than what a search snippet or a “best of” listicle claims on their behalf, and most of them stop at naming the weak rubric category.
Then we signed up for one and used it. FluentPrep marks errors sentence by sentence, inside the text you submitted — something its own marketing pages never say. The question this post originally asked, “who gets down to the sentence,” turned out to be the wrong question.
The question that still separates these tools comes one step later. You have been shown the sentence; you redo it. Does that redo get saved and scored against your original, or does it evaporate when you close the tab?
What “Feedback Depth” Actually Means
Three levels of AI feedback exist, and most tools stop at the first or second.
| Level | What you get | Usefulness |
|---|---|---|
| Session-level | One total score for the whole attempt | Low — you know the destination, not the detour |
| Dimension-level | Scores broken down by rubric criteria (fluency, coherence, vocabulary…) | Medium — you know which area to work on |
| Issue-level | The specific sentence or phrase flagged, so you can see what to fix | High — you know the actual problem |
| Tracked repractice | A redo tied to that one issue, saved and graded against the original | Highest — you find out whether the fix worked |
If you want context on how the 2026 reform changed what gets scored, the breakdown of the new 1–6 band system is worth reading first.
How We Checked This
We read each tool’s pricing page, feature pages, and any page carrying an ETS-related claim, as of July 2026. Where a claim couldn’t be found on the vendor’s own site, we marked it unverified rather than repeating it. That’s why some numbers below differ from what these tools’ own marketing pages claim about competitors.
In August 2026 we went one step further on a single tool: we created a FluentPrep account and submitted real responses to it. That upgraded its entry substantially, and it is the caveat to carry into the other four. “Not documented” below means we could not find it on the vendor’s site — not that we opened the product and confirmed it was missing.
We held ourselves to the same bar. Toeflair’s own “issue-level repractice” claim only checked out for one of our four task types once we read the code instead of the marketing copy. That’s reflected in our own entry below, not smoothed over.
1. TOEFLAIR
Feedback depth: Tracked repractice on Listen and Repeat (dimension-level on the rest)
TOEFLAIR covers all four core TOEFL task types: Listen and Repeat (sentence shadowing), Interview Practice (timed spoken responses), Email Writing (formal and informal email scenarios), and Academic Discussion (professor-prompt responses). Every response is scored against the ETS 2026 rubric with a full dimension breakdown, not just a total.
On Listen and Repeat, every miss is first classified by cause:
- you never caught the word in the audio
- you caught it but couldn’t produce it
- you rebuilt the sentence in your own words
You then say the sentence again — the recording is the whole sentence, not a clip of the flagged words. What narrows to the single issue is everything after it: the attempt is saved to that issue’s own history and graded against your original as STILL, IMPROVED, or FIXED, and the rest of your answer is left alone instead of quietly re-scored.
That last part is what nothing else here does. Being shown the bad sentence is now common; keeping a record of whether your fix actually landed is not.
Interview, Email Writing, and Academic Discussion give you the same rubric-level detail — every dimension scored, every response annotated — but repracticing a single flagged issue there isn’t shipped yet. We’re not going to claim otherwise to make the ranking look cleaner.
Pricing is public: the free plan gives 5–6 practice sets per practice type with full AI feedback and 2 Listen and Repeat repractices per session. The Pro plan is $17/month on a 3-month one-time payment ($51 total), no auto-renewal.
Best for: Students who want to drill exactly what’s holding their Listen and Repeat score back, and full dimension-level detail on everything else.
2. FluentPrep
Feedback depth: Issue-level, redo not saved
FluentPrep covers 12 item types across all four TOEFL sections, including the same four Toeflair focuses on. Every response gets scored 0–5 on each dimension, plus a full transcript. Its free tier needs no account at all: on 2026-08-04 the daily allowance ran from 1 free Interview up to 5 free Build a Sentence items.
We submitted a 112-word Write an Email response with four planted grammar errors and one requirement deliberately skipped. What came back:
- corrections rendered inline into the sentences we had written
- an Issues Summary listing four issues, each with a category and a severity
- the deliberately skipped requirement, caught
That is the entry our July pass got wrong. FluentPrep’s own blog described the feedback as “general category feedback, not sentence-level analysis” — a page since rewritten, and a description the product no longer matches. Reading the site was not the same as using it.
Where it stops is the redo. Speaking items let you restart from a sentence you pick, and each Interview question carries a “Re-answer this question” control labelled as targeted practice. Both update the result on screen, and the setup screen states plainly that a partial run isn’t saved or counted toward progress. You can fix the sentence; the tool won’t remember that you did.
Pricing: free tier as above, or Pro at $19.99/month, or $41.98 for 90 days (about $13.99/month).
Best for: Students who want sentence-level correction across every 2026 task type, and the largest free daily allowance, without needing a record of what improved.
3. PrepEx AI
Feedback depth: Dimension-level
PrepEx AI runs on a question bank of 2,500-plus items and says it’s trusted by 50,000-plus students across 86 countries. Its AI speaking coach, Petra, delivers feedback after spoken responses, and the writing track covers both email writing and academic discussion in full.
The gap: nothing on its site documents a targeted redo, or a way to retry just the criterion that failed without repeating the whole response. We read the pages rather than running the product, so read that as undocumented, not as confirmed missing. One claim to flag — PrepEx’s site says “EdTech Award Winner 2025,” but we searched independent award trackers (EdTech Digest, EdTech Breakthrough, the Asia ATP program it names) and found no third-party record of the win. Treat that one as self-reported.
Pricing is public: $39.99/month, or $89.99 per quarter.
Best for: Students who want a large question bank and a named AI coach persona, and don’t need writing-task feedback beyond dimension scores.
4. LingoLeap
Feedback depth: Dimension-level, with a catch
LingoLeap is a dual TOEFL/IELTS product covering all ten official 2026 task types, including the four Toeflair also covers. Its writing feedback names specific criteria: four for Email Writing (content, organization, language use, communicative effectiveness) and three for Academic Discussion (relevant contribution, elaboration, syntactic variety).
The catch: each question’s final score is still a single 0–5 holistic number. The dimension breakdown lives in the written feedback, not the score itself. Nothing on the site documents a targeted redo — again, pages checked, product not run.
Pricing runs on a subscription-plus-credits model: roughly $20/month (Plus) to $49/month (Premium), with AI evaluations metered by credits per attempt. One number to flag — LingoLeap’s own pricing page cites “10k+ Members,” while its App Store listing and a third-party writeup cite “100,000+ test-takers,” a full order of magnitude apart. We’re citing the lower, vendor-domain number here.
Best for: Students prepping for both TOEFL and IELTS who want one tool covering every 2026 task type.
5. ETS TOEFL TestReady
Feedback depth: Dimension-level
TestReady is ETS’s own official practice platform — not a third party. What separates it from everything else on this list: its pages state plainly that “all feedback, recommendations, personalized insights and tips are developed by the same teams that write and produce the TOEFL iBT test,” using “the same automated scoring as in the actual TOEFL iBT test.” That’s a credibility claim no third-party tool here can make.
Even so, TestReady’s own materials describe feedback at the “question/task type and feature level” — writing (grammar, usage, mechanics) and speaking (speech rate, rhythm, pronunciation), plus a full transcript and model-answer comparison. We found no mention anywhere on ETS’s site of pinpointing one sentence for a targeted redo. On the evidence its own pages give, the organization that writes the exam stops at dimension-level.
Pricing: a free tier is documented (daily practice, a diagnostic quiz, progress tracking); ETS doesn’t publish the paid tier’s price on its own site.
Best for: Students who want practice content and feedback calibrated by the exact organization that writes and scores the real test.
How to Choose
Weak section is Listen and Repeat specifically, and you want a record of whether your fix landed? That’s the one thing we didn’t find anywhere else here: you say the sentence again, and that attempt is saved against the flagged issue and graded against your original.
Deciding between TOEFL and IELTS prep, or need both? LingoLeap’s dual coverage is the only one of these five built for that from the ground up.
Want sentence-level correction without paying, or even signing up? FluentPrep marks errors inline across every 2026 task type, and its free tier needs no account at all.
Care most about the scoring engine’s credibility — not the UI, not the question count, just “is this the same grader ETS uses”? TestReady is the only tool here that can say yes without qualification, because it’s ETS’s own product.
Still building skills across Listen and Repeat, Interview, and both writing tasks? Dimension-level feedback tells you where to focus, issue-level tells you what to fix, and tracking tells you whether you fixed it. How AI actually grades TOEFL speaking walks through what these scoring engines are measuring before you pick a tool.
Quick Comparison
| Tool | Feedback depth | Covers writing | Redo saved and graded | Pricing |
|---|---|---|---|---|
| TOEFLAIR | Tracked repractice (L&R) · Dimension-level (rest) | Yes | Listen and Repeat only | Free / $51 per 3 months |
| FluentPrep | Issue-level | Yes | No — on screen only | Free / $19.99/mo |
| PrepEx AI | Dimension-level | Yes | Not documented | $39.99/mo or $89.99/quarter |
| LingoLeap | Dimension-level | Yes | Not documented | $20–49/mo |
| ETS TestReady | Dimension-level | Yes | Not documented | Free tier / paid price undisclosed |
Only FluentPrep’s row comes from running the product. The three “not documented” rows come from reading the vendor’s pages, which is a weaker claim — as FluentPrep’s own row demonstrates.
Start with the Free Plan
Not sure which tool fits your prep? TOEFLAIR’s free plan gives you 5–6 practice sets per practice type with full AI feedback — no payment required. You can see how dimension-level scoring works, and run a tracked repractice on Listen and Repeat, before committing to anything.
Sign up free at toeflair.com and run one speaking task. The feedback report will tell you more about your current level than a month of unscored practice.