Frequently Asked Questions

Coda One is four writing tools: an unlimited free AI Detector, an AI Humanizer, an AI Rewriter and a Grammar Checker. Writing tools send your text to our API for processing — see /privacy for exactly what is and is not stored.

No. The AI Detector and the free tier of every writing tool work without an account. Creating an account helps with usage history and saved preferences.

The AI Detector is free with no daily limit. Writing tools have a free entry tier of 3 uses per day, with paid plans for heavier usage.

The AI Detector, AI Humanizer, AI Rewriter and Grammar Checker. The detector highlights sentence-level patterns associated with AI writing; the other three edit your text for clarity, tone and grammar.

The AI Humanizer transforms AI-generated text into natural, human-sounding content. It preserves the original meaning while adjusting sentence structure, word choice, and rhythm. You can choose from multiple writing modes (Standard, Academic, Blog, Formal, Simple, and more on paid plans).

Free and unlimited, with no account: there is no daily cap, only a 3,000-word limit per check on the free plan. It also reads English style only — for Chinese, Japanese or Korean text it says it cannot judge rather than returning a score it cannot stand behind. No detector is always right. We show which sentences carry AI tells and why — treat the score as a starting point, not proof.

Yes, and it needs no card. The AI Detector is unlimited on it; the Humanizer, Rewriter and Grammar Checker each give you 3 runs a day.

Three, all single-user and all self-serve through Stripe. Starter is $7.99/mo billed annually, or $9.99 billed monthly: 30,000 words a month, 500 words per request (800 on the Grammar Checker) and no word cap on the AI Detector, 1 brand voice. Pro is $15.99/mo billed annually, or $19.99 billed monthly: 100,000 words a month, up to 1,500 words per run on the Humanizer (750 in Expand mode), 5,000 on the Rewriter (2,500 in Expand mode) and 3,000 on the Grammar Checker, no word cap on the AI Detector, 3 brand voices. Business is $31.99/mo billed annually, or $39.99 billed monthly: 500,000 words a month, the same per-run limits, unlimited brand voices. All three drop the 3-uses-a-day cap and unlock every writing mode. Full comparison at /pricing.

Yes. Upgrade, downgrade, or cancel at any time from your Dashboard, with no call and no retention queue. They behave differently, and the difference is money. An upgrade charges the prorated difference straight away, and the new plan starts once that payment goes through; if the payment fails, your plan stays as it was. A downgrade takes effect immediately, and the unused part of your old plan is credited against your next invoice. A cancellation keeps your plan until the end of the period you have already paid for, after which the account reverts to Free.

Requests stop and you get a message showing how many words are left, rather than a partial result. Paid plans are not silently dropped to free-tier limits. The allowance refills at the start of each calendar month, not on your billing date, so a plan bought mid-month gets its first refill on the 1st. To carry on sooner, move to a higher plan.

Yes, with three conditions worth knowing before you buy rather than at the point of asking: the request has to be within 7 calendar days of the original purchase, you have to have used less than 20% of that month's word allowance, and it has to be your first refund. Past 20% we still refund, but prorated against what is left. Email [email protected]; the full policy is at /refund-policy.

No. Paid plans are card only, processed by Stripe. We exited crypto payments in August 2026. The free tier needs no payment method at all.

Text is processed for the current request, and we never use it to train models. Signed out, nothing is kept in your account; signed in, the Humanizer, Rewriter and Grammar Checker save the input and result to your own tool history, which you can delete. Results are also briefly cached at the edge so an identical submission returns instantly. See /privacy for exactly what each tool sends where.

For AI writing tools, we send your text to our API for processing. Used anonymously, it is not kept beyond a short cache (up to 24 hours). Signed in, the input and result are saved to your own tool history so you can find them again — see /privacy. We also collect basic analytics (page views, tool usage counts), never including your text.

No. We never use your submitted text or documents to train any AI models. Used anonymously, your content is not kept beyond a short cache (up to 24 hours). Signed in, the input and result are saved to your own tool history so you can find them again — see /privacy.

We use PBKDF2 with 100,000 iterations for password hashing — the ceiling Cloudflare Workers allows — support TOTP two-factor authentication (Google Authenticator compatible), and require email verification for new accounts.

Yes. The data controller is Coda Web3 Creative Ltd, registered in the UK. If you are in the EEA you can access, rectify, erase, restrict or port your data, object to processing based on legitimate interest, and withdraw consent. Most of it you can do yourself: delete your account from Dashboard settings, clear your tool history, unsubscribe from email. For anything else, email [email protected] — we respond within 30 days. See /privacy §15 for the full list and §20 for the controller details.