Privacy Policy

Paper Worlds saves your artwork and progress on your device. The app uses Firebase Analytics to understand app usage and RevenueCat to provide in-app purchases. You can also choose to share a postcard or email us for support.

Last updated: 23 October 2026

Data you create

Postcards, drafts, favorites, names you give postcards, progress, and settings are stored in the app on your device. We do not operate an account system or a cloud service that receives or backs up your artwork. You can delete an individual postcard in the journal. Removing the app may remove its local data; restoring a purchase does not restore artwork or progress.

App analytics

In release versions, Google Firebase Analytics collects app usage information, including automatically collected events and device and app information, as well as events such as opening the Shop, viewing World Passport, completing scenes, using Restore purchases, and purchase attempts and results. Firebase uses an app instance identifier to associate activity with an installation. We use these reports to understand how the app works and improve it. We do not send postcard images, postcard names, email addresses, or payment card details as custom analytics events. Analytics collection is disabled in normal development builds. See Firebase's privacy information for more about its processing.

Purchases

Optional one-time purchases are processed by your app store and managed in the app through RevenueCat. RevenueCat creates a random, anonymous app user ID when the purchase service is configured. It processes that ID together with purchase, entitlement, and device information to provide purchased access and restore purchases. We do not receive your full payment card number. Your app store and RevenueCat handle their related information under their own policies; see RevenueCat's Privacy Policy. Paper Worlds does not require you to create an account with us.

Sharing and photos

When you choose Share on a postcard, Paper Worlds creates an image on your device and opens the system share sheet. The destination you select may receive that image under its own privacy practices. We do not automatically upload postcards to our servers. If you choose Save Image in the share sheet, iOS asks your permission to add the image to Photos. Paper Worlds does not read or browse your existing photo library.

Support messages

If you email us, we receive the information you choose to include, such as your email address, message, and any app version or device details in the message. We use it to respond and investigate your request. Please do not send payment card details or other sensitive information. Email is handled by your email provider and ours.

Ads and tracking

Paper Worlds does not currently display ads or use your information for cross-app advertising tracking. We do not sell your personal information. Analytics and purchase services do send the information described above to their providers; this app should not be described as collecting no data.

Retention and your choices

You can delete postcards in the app or remove the app to remove local app data from your device. Purchase records may remain with your app store and RevenueCat for purchase access and recordkeeping. Firebase retains analytics information under its service settings. If you want to ask about information associated with your support email, analytics, or purchase ID, or request deletion where available, contact us at khang.plant@gmail.com. We may need information that identifies the relevant record to process a request. Removing the app does not automatically delete information already held by these providers.

Children

Paper Worlds is not directed to children under 13. If you believe a child has sent us personal information, contact us so we can review the request.

Changes to this policy

We may update this policy when the app or its data practices change. We will update the date at the top of this page when we do.

Contact

For privacy questions, email khang.plant@gmail.com.