Privacy Policy

Last updated: 2 June 2026

kami ("the app") is an interactive origami-folding simulator available as a web app, an installable Progressive Web App (PWA), and an Android app distributed through Google Play. This policy explains what data the app processes and why.

1. Who is responsible

The app is developed and operated by an independent developer ("we", "us"). For any privacy question, contact: max.vvase@gmail.com.

2. Data we do not collect

• We do not require an account, sign-in, or registration.
• We do not ask for your name, email, phone number, or contacts.
• We do not collect, store, or transmit your precise location.
• We do not sell your data or share it with advertisers.

3. Device sensor data (processed locally)

To animate paper folding in response to your device, the app reads:

• Device posture / fold angle (foldable phones and laptop lids) via the Device Posture and Viewport Segments APIs.
• Motion / orientation from the accelerometer, when available and permitted by your device.

This sensor data is processed entirely on your device, in real time, to render the animation. It is never transmitted to us or any third party, and it is not stored.

4. Analytics (only with your consent)

On the web/PWA version, we use Google Analytics 4 to understand how the app is used so we can improve it. Analytics is disabled by default. It runs only after you grant consent through the cookie banner (Google Consent Mode, analytics_storage starts as denied). You can change or withdraw consent at any time via the "Cookie preferences" option in the app.

When enabled, analytics collects:

• Anonymous usage events — e.g. fold_triggered, paper_reset, undo_action, panel_toggled, keyboard_shortcut, outbound_link.
• Standard technical data Google Analytics records: approximate (coarse) region derived from a truncated IP address, device/browser type, and pages viewed.

Google acts as a data processor. See Google's Privacy Policy and how Google Analytics handles data. For details on cookies, see our Cookie Policy.

5. Legal basis

Where the GDPR applies, our legal basis for analytics is your consent (Art. 6(1)(a)). Sensor processing for the animation happens locally and never leaves your device.

6. Data retention

We retain analytics data only in aggregate within Google Analytics, subject to Google's retention settings. We hold no personal database of our own.

7. Children

The app is suitable for general audiences and does not knowingly collect personal data from children.

8. Your rights

Depending on your jurisdiction (e.g. GDPR/CCPA), you may have rights to access, correct, or delete your data, and to withdraw consent. Because we do not maintain user accounts or store personal data ourselves, the primary control is the analytics consent toggle in the app. For any request, contact max.vvase@gmail.com.

9. Changes

We may update this policy. Material changes will be reflected by the "Last updated" date above.