Privacy Policy

ArtPatt (“we,” “us”) provides free and paid tools that turn photos into printable craft patterns at artpatt.com and in the ArtPatt app for iPhone. This policy explains what data we collect, why, and how you can control it.

Your photos and generated patterns

Pattern generation happens entirely in your browser. When you upload a photo, it is loaded into your browser's memory and processed there — pixelation, color matching, dithering, and PDF rendering all run on your device. We do not receive or store your photo just because you generated a preview.

If you choose to save a pattern to your account, a thumbnail (and, depending on the craft, the source image) is uploaded and stored in our database so you can find it again later. This only happens when you explicitly click Save — never automatically.

ArtPatt for iPhone

The iPhone app makes patterns on your phone, with the same engine as the website. Your photo, the charts you make and your row-counter progress are kept on the phone and are not uploaded to an account library. If the phone cannot make a chart, the app sends the photo to our server once to make it; the server processes it in memory and does not store it. Background removal uses Apple's on-device Vision framework. The camera is used only when you tap “Take photo”; picking a photo from your library gives the app only the photo you choose.

You can use the app without signing in: it creates an anonymous account with no name or email, so purchases have somewhere to be recorded. If you sign in, you can use Sign in with Apple (Apple shares your name and either your email or a private relay address, as you choose), Google, or email. Signing in joins the anonymous account's purchases to your account.

Purchases in the app are made through Apple's App Store; we do not see your payment details. We record each purchase (product, transaction ID, dates) on your ArtPatt account, so Pro and unlocked patterns work on every device and on artpatt.com, and Apple sends us notices about renewals, cancellations and refunds.

The app sends a few product events (for example: pattern made, paywall shown, purchase completed) with your account ID to PostHog's EU region, and usesSuperwallto decide which version of the purchase screen you see, which receives your account ID and basic device information. The app does not track you across other companies' apps or websites, shows no ads, and does not use the advertising identifier.

You can delete your account in the app: Account → Delete account. This deletes your ArtPatt account and its purchase records on our server, cancels a subscription bought on artpatt.com, revokes Sign in with Apple if you used it, and removes the patterns on the phone. A subscription bought through the App Store is managed by Apple: cancel it in Settings → Apple Account → Subscriptions.

Account information

When you create an account, we collect:

• Your name and email address
• If you sign up with Google, your Google profile name, email, and avatar image
• If you sign up with email/password, a securely hashed password (we never store your password in plain text)
• Basic session data — IP address and browser user-agent — used to keep you signed in and to protect your account from abuse

Payments

Purchases (single-pattern unlocks and Pro subscriptions) are processed by Polar, our payment processor. We do not see or store your full card details — Polar handles that directly. We send Polar your email, name, and account ID so it can create the checkout and match the payment back to your account; guest (not signed in) purchases have Polar collect your email directly on its checkout page.

Analytics and error tracking

We use first-party product analytics stored in our database andPostHogfor product analytics and error monitoring. This helps us understand which pages and features are used, improve the product, and catch bugs. We do not use analytics to build advertising profiles or sell your data to third parties.

Cookies and local storage

We use a first-party cookie to keep you signed in. PostHog may use cookies or local storage to recognize repeat visits and measure product usage. You can block or clear cookies in your browser settings; doing so may sign you out or affect some site functionality.

Email

We send account emails (email verification, purchase receipts, pattern-ready notices) through Amazon SES, with Resend as a backup. We may also send a short welcome series, a tip for a better pattern, reminders about a pattern you made, an unfinished checkout or a free pattern becoming available again, and, if you cancel a subscription, a note before it ends and one a few weeks later. We send at most one of these every three days. Every one of them has a one-click unsubscribe, you can switch them off under “Emails from ArtPatt” in the account menu, and you can also email us at any time to opt out.

How we share data

We don't sell your personal data. We share data only with the service providers named above (Polar for payments, Apple for App Store purchases and Sign in with Apple, PostHog for analytics/error tracking, Superwall for the app's purchase screen, Amazon SES and Resend for email, Google for sign-in), each acting on our behalf to run the product, and only as needed for them to do their job. Each of them is bound by its own privacy and security terms to protect your data at least as well as this policy does. We may also disclose information if required by law.

How long we keep data

We keep your account, saved patterns and purchase records for as long as your account exists, so your purchases keep working on every device. When you delete your account (in the iPhone app, or by emailing us), we delete them from our database. Sign-in sessions expire on their own and are removed when you sign out. Product analytics events stay in PostHog to measure how the product is used over time; email us and we will delete the events linked to your account. Payment providers (Apple, Polar) keep their own records of your payments as the law requires.

Your choices

• You can delete a saved pattern from your account at any time.
• You can delete your account in the iPhone app (Account → Delete account), or request a copy of your data, or full account deletion, by emailing us — see below.
• You can unsubscribe from marketing emails at any time.

Children's privacy

ArtPatt is not directed at children under 13, and we do not knowingly collect personal information from children under 13.

Changes to this policy

We may update this policy as the product changes. We'll update the “last updated” date above when we do. If a change is significant, we'll make a reasonable effort to let existing account holders know.

Contact us

Questions about this policy, or want your data deleted? Email social@artpatt.com.

See also our Terms of Service.