1 credit = 100 English words (200 Korean characters). Detection only: 1 credit per 500 words. Credits never expire, and if a document scores under 90 the credits spent on it come back automatically.
10 free credits (1,000 words) at sign-up. Card payments via Stripe; KRW via Toss Payments. VAT not included.
Essay 500–700 words · personal statement 650 · master's thesis 15,000–25,000 · letter 200–400
| neepora credits | Monthly A (words expire) | Monthly B (request limit) | |
|---|---|---|---|
| A month you do not use | Still there | Gone | Gone |
| Longest single input | No limit (auto-split) | 5,000 words | 600–3,000 words |
| Detector score | On every result | Separate tool | Separate tool |
| If the score misses | Credits back automatically | Refund request | None |
| Public results log | Yes | No | No |
A and B are the pricing structures of two top-ranking services as of September 2026.
When your balance drops under 20 credits, a Starter pack is added automatically. Off by default, switch it off any time; nothing is charged unless you turn it on.
You and the person you invite each get 20 credits. When they make a first purchase, you get 20 more, once.
A document scoring under 90 on GPTZero returns its credits automatically, once per document. An unused pack is refunded in full within 14 days.
Yes, for as long as the account exists. After three years without a login we email you, then close the account.
One rerun with a different donor is free. After that, the word count is charged again.
Yes. Korean counts 200 characters per credit. GPTZero's Korean verdicts are rougher than English, so the score guarantee applies to English documents.
It is roughly the lower edge of the range GPTZero labels "highly confident entirely human". Rescans of the same document vary by ±3, so 87–93 is the same result.
Check your rules first. This is not built for assignments where AI drafting is forbidden. It is for cases where AI drafting is allowed and you do not want the result judged on sounding like a machine.
