What happens to your draft
You paste it
Choose the type of work, your subject and your exam session. The first preview needs no account and no card.
It is read against your criteria
An AI marks the draft against the published IB criteria for that subject and session. The mark is an estimate: we have not measured it against examiner marks, so use it to decide what to fix. Read three real reports, unedited
You see where the marks go
The free preview is the first half of your report: the range your total falls in, the overall comment and the first half of the criteria in full. The full report adds the estimated mark, a mark and a comment for every criterion your text can show and a ranked list of fixes, for $5. It comes with up to 20 re-checks within 30 days, so you can check each revision until you hand the work in.
Your essay is not kept
Our server in Helsinki sends it to Anthropic, which marks it. IBLens never saves the text, and Anthropic deletes it within 30 days unless its usage policy or the law requires otherwise. Privacy Policy
It tells you what to fix. You do the writing.
The report points to passages in your draft and says what each criterion is missing. It is instructed never to write sentences you could paste in.
The IB academic integrity policy rules out non-permitted help with coursework, so check with your teacher that outside feedback is allowed. For the Extended Essay, ask your supervisor.
Using AI feedback within IB rulesFor your subject and session
The IA in Business Management, Economics, History, Biology, Chemistry, Physics, Mathematics, Computer Science, Psychology, English A, the coursework in Visual Arts, Music and Film, the Extended Essay, the TOK essay and the TOK exhibition.
The Extended Essay can be marked on the November 2026 or the May 2027 criteria, and Psychology and Computer Science on their 2027 formats. Pick your session and the report follows it.
What a read of your draft costs
- IBLens
- $5 a piece of work, and the first half of every report is free. About a minute, with up to 20 re-checks within 30 days. Uses the published criteria for your subject and session, as an estimate.
- Tutor
- Paid by the hour, when they have a slot. Subject judgement no tool has.
- Teacher
- Free, and knows you, your school and the criteria. Usually comments on one draft of coursework.
| Compared | Tutor | Teacher | IBLens |
|---|---|---|---|
| Price | By the hour | Free | $5 the first half of the report free |
| When | When they have a slot | Usually one draft of coursework | About a minute, with up to 20 re-checks within 30 days |
| What it knows | Subject judgement no tool has | You, your school and the criteria | The published criteria for your subject and session, as an estimate |
$4.50 per report
Prices in US dollars; VAT or sales tax is added at checkout where it applies. Not what you needed? Email us within 7 days for a full refund. Refund policy
"I built this because my son's IB tutor charged $120 for one feedback session, and it came the week before the deadline."
Ivan, founder of IBLens and an IB parent. It does not replace your teacher; it gives you a read against the criteria while there is still time to act on it.Also on IBLens
Questions
Which subjects and types of work does IBLens mark?
The IA or coursework in 14 subjects (Business Management, Economics, History, Biology, Chemistry, Physics, Mathematics, English A Language and Literature, English A Literature, Psychology, Computer Science, and the externally assessed coursework in Visual Arts, Music and Film), the Extended Essay, the TOK essay and the TOK exhibition. Each is marked on its own published criteria for your exam session. Visual Arts can be marked only for sessions through November 2026: from May 2027 the comparative study is no longer set.
Is the first preview really free?
Yes. The preview is free and needs no account: it is the first half of your report, with the range your total falls in, the overall comment and the first half of the criteria in full (for the TOK essay and exhibition, which are marked as a whole, the band and the first half of the explanation). The rest, with the estimated mark, a mark for each criterion that can be judged from your text and a ranked list of fixes, opens for $5, with up to 20 re-checks within 30 days. A parent can pay for it from a link you send.
What payment methods do you accept?
Payments are handled by Lemon Squeezy, which accepts major cards and the other methods shown at checkout. Prices are in US dollars, and VAT or sales tax is added at checkout where it applies. Your reports are added automatically once the payment is confirmed.
What if I'm not satisfied with my report?
Email us at glushkovim@gmail.com within 7 days of your purchase and we'll refund you in full, no questions asked. We send the refund to the original payment method within 3-5 business days of approving it, and your bank may take a further 5-10 business days to show it.