Privacy Policy

For the Puzzlestack app · Last updated 5 November 2026

1. No Data Collection

Puzzlestack does not collect personal data, and we have no servers that receive it. There is no account, and the app contains no analytics, advertising or tracking SDKs.

2. Data Storage

Your puzzles, sittings, the people you puzzle with, box and progress photos, ratings and settings are stored on your device, using Apple’s SwiftData framework. If you’re signed in to iCloud, they also sync between your devices through your private iCloud database (Apple’s CloudKit). That copy belongs to your Apple Account, and we can’t access it.

A running sitting timer is saved on the device so it survives the app closing. Home Screen widgets read a summary through an App Group on the same device, and the Apple Watch app gets the same summary and your list of puzzles from your iPhone. Nothing is uploaded to us.

3. Camera and Photos

The camera is used only to scan a puzzle’s barcode and to photograph boxes and progress. Photos you take or pick from your library are stored with that puzzle, as described above. Puzzlestack doesn’t read the rest of your photo library.

4. Barcode Lookups

When you scan or type a barcode, Puzzlestack sends only the barcode number to UPCitemdb (upcitemdb.com), a public product database, to fill in the title, brand and piece count. Like any website, UPCitemdb sees your device’s IP address with the request. If it returns a picture of the box, the app downloads that picture from the retailer link UPCitemdb provides. Nothing else about you or your collection is sent, and you can always type a puzzle in by hand instead.

5. Purchases

Puzzlestack Pro is sold through Apple’s App Store using StoreKit. Apple handles the payment, and we never see your payment details or Apple Account. The app only asks Apple whether you own Pro, and that check happens on your device. Pro is a one-time purchase, not a subscription, that you can share with your family through Family Sharing. Use Restore Purchases in the app to unlock it on a new device.

6. Data Sharing

Your data is never sold or shared with anyone. It leaves your device only for the barcode lookups above, or when you choose to share it, for example by exporting your puzzles and sittings to CSV or sharing your year in review.

7. Your Rights

You control all of your data. You can delete puzzles, sittings and people in the app, and deletions sync to your other devices. Deleting the app removes its data from that device. To delete the iCloud copy, go to Settings › [your name] › iCloud › Manage Storage, or visit privacy.apple.com.

8. Children

Puzzlestack is suitable for all ages and collects no data from anyone, including children.

9. Changes

We may update this Privacy Policy occasionally. When we do, we will update the “Last updated” date at the top of this page.

Contact

Questions? Email [email protected].