Privacy policy
Last updated 2 November 2026.
This policy explains what SheetInk AI (“we”) collects when you use SheetInk AI, why, who helps us run it, and the choices you have. Questions or requests: hello@sheetinkai.com.
What we collect
- Account details: your name, email address and a scrypt hash of your password (never the password itself).
- Worksheets: the files you upload, the cleaned page images we make from them, your answers, and the PDFs and images we write. Location and camera details are removed from photos when uploaded.
- Handwriting: the letter shapes taken from your template or note photos. We keep the shapes, not the photos.
- Usage and billing: how many AI drafts you use, which ads you completed to unlock features, and your plan. Payments are handled by Whop; we never see your card details.
- Technical data: your IP address and request times, kept briefly to prevent abuse (rate limits) and fix errors, and which days you used the app (to count active users; no browsing history).
Why we use it
- To run the service you asked for: reading worksheets, drafting answers, writing in your handwriting.
- To keep accounts secure, prevent abuse and enforce plan limits.
- To show the optional ads that unlock free features, and to take payment for Pro.
- To email you about your account (password resets). We don’t send marketing email.
Where the GDPR applies, our legal bases are: performing our contract with you (running the service), our legitimate interests (security, abuse prevention, improving reliability), and your consent (advertising cookies, which you can withdraw at any time in cookie settings).
Who helps us run it
- OpenAI reads worksheet pages to draft answers, and reads the words in note photos to learn your letters. This is under OpenAI’s business terms: they don’t use it to train their models.
- Google (Ad Manager) may show ads to Free users and visitors: the optional rewarded ads, and, where switched on, small display ads. Every Google ad request is marked for child or teen treatment and asks for non-personalised ads only, so no ad profile is built from SheetInk AI. Google may still use cookies for frequency capping and fraud prevention if you accept them. See how Google uses information from sites that use its services.
- Whop processes Pro payments. Resend sends account emails. Our hosting and database provider stores the data.
Some of these providers are outside your country, including the United States. They process data only to provide their service to us, under data-protection terms.
We also show our own promotions (for example, for other products we run). They are plain links with no tracking cookies; we only count how often each one is seen and clicked, not by whom.
Who can see your work
Only you. Files are stored privately and served only to your signed-in account. We don’t sell personal data and we don’t share your worksheets or handwriting with anyone except the providers above, for the purposes above.
How long we keep it
Until you delete it. Delete any worksheet or handwriting profile at any time, or delete your whole account in Settings, which removes your files and data straight away. Security and billing records may be kept longer where the law requires.
Children and students
SheetInk AI is for students aged 13 and over. If you are under 16 (or the age of digital consent where you live), use it with a parent’s or guardian’s permission. We don’t knowingly collect data from children under 13; if you think a child under 13 has an account, contact us and we will delete it. Ads for users who haven’t accepted advertising cookies are not personalised.
Your rights
You can access, correct, download or delete your data, object to or restrict its use, and withdraw consent. Most of this you can do yourself in the app; for anything else, contact hello@sheetinkai.com. You can also complain to your local data-protection authority.
Changes
If this policy changes in a way that matters, we’ll update the date above and tell signed-in users.