Terms of Use

Last updated: 13 November 2026

These terms are an agreement between you and the Draftproof team ("we", "us") for your use of the Draftproof app for iPhone ("the app"). By using the app you accept them. If you do not agree, please do not use the app.

What the app does

The app compares your writing with pages on the public web and shows which passages match which source, estimates how much of a text reads as AI-generated, and checks your citations against your reference list on your device. It is a tool for reviewing and revising your own work before you submit it.

Results are estimates, not proof

• The similarity check searches the public web and compares your text with the pages it finds. It cannot find every source, and it does not search private databases, paid journals or other students' papers. A low score does not mean a text is original, and a match does not by itself mean wrongdoing: quotations, common phrases and properly cited passages can match too.
• The AI-writing reading is a probabilistic estimate produced with AI models. It can be wrong in both directions: human writing can be flagged as AI, and AI writing can be read as human.
• The citation check works from the patterns in your text and can miss or misread citations.
• The app is independent. It is not affiliated with, endorsed by or equivalent to the checker used by any school, university, publisher or employer, and its results will differ from theirs. A result in the app does not predict the result of any other checker.
• Use results as one signal alongside your own judgement. Do not rely on a result alone for a decision that affects someone's grades, job, reputation or legal position, and do not present a score as proof about another person's work. You are responsible for how you use a result and for the work you submit.

Your content

• You keep all rights to the text you check.
• You give us permission to process that text, including through our service providers, only to produce your report.
• You confirm that you have the right to submit the text and that doing so does not break the law or someone else's rights.

How content is handled is described in the Privacy Policy.

Acceptable use

You agree not to:

• submit content that is illegal or that you have no right to share;
• use the app to harass or defame anyone;
• try to get around usage limits, access the service other than through the app, or automate requests;
• disrupt, overload, probe or reverse engineer the service, except where the law allows it.

We may limit or suspend access when these terms are broken or to protect the service.

Free reports and Pro

A new installation includes a small number of free reports, with a lower word limit per paper. Further reports and longer papers need an active Pro subscription. To keep the service reliable for everyone, daily fair-use limits apply to Pro. The current allowances are shown in the app. Limits and features may change.

Pro subscriptions

• Subscriptions are purchased through your Apple Account. The price and period are shown before you confirm.
• A subscription renews automatically unless it is cancelled at least 24 hours before the end of the current period. Your Apple Account is charged for renewal within 24 hours before the period ends.
• If a free trial or introductory price is offered, it converts to a paid subscription at the price shown unless cancelled in time. Any unused part of a free trial is forfeited when you buy a subscription.
• Manage or cancel a subscription in your Apple Account settings. Deleting the app does not cancel it.
• Payments and refunds are handled by Apple under its own terms; we cannot issue refunds for App Store purchases.
• Use "Restore purchases" in the app to recover a subscription on a new device signed in to the same Apple Account.

Availability and changes to the app

The app depends on our server and on third-party services, and needs an internet connection to run a check. We try to keep it available but do not promise uninterrupted service. We may change, add or remove features.

Ownership

The app, its design and its software belong to us or our licensors. We grant you a personal, non-transferable licence to use the app on Apple devices you own or control, as permitted by the App Store rules.

Disclaimers

The app is provided "as is" and "as available". To the extent the law allows, we make no promise that results are accurate, complete or fit for a particular purpose.

Limitation of liability

To the extent the law allows, we are not liable for indirect or consequential loss, or for decisions made on the basis of a result. Our total liability for any claim relating to the app is limited to the amount you paid for the app in the twelve months before the claim. Nothing in these terms limits rights that cannot be limited under the consumer laws of your country.

Apple

These terms are between you and us, not Apple. Apple is not responsible for the app or its content and has no obligation to provide support for it. Apple's standard Licensed Application End User Licence Agreement also applies to your use of the app, and Apple and its subsidiaries may enforce these terms as third-party beneficiaries.

Ending these terms

You can stop using the app at any time by deleting it. We may end or suspend your access if you break these terms. The sections on results, liability and ownership continue to apply afterwards.

Changes to these terms

We may update these terms. The date at the top shows the latest version, and the current terms are always available in the app under Settings. Continuing to use the app after a change means you accept the new terms.

Contact

Questions about these terms: open the app, go to Settings and choose "Contact support", or write to contact@heytech.work.