Privacy Policy

Last updated: 10 June 2026

Summary

Qubun does not collect, store, or transmit any personal data. There are no accounts, no analytics, no third-party SDKs, and no advertising.

What the app stores on your device

Qubun saves a small amount of information locally on your iPhone, in standard iOS UserDefaults storage:

• Your chosen player name (defaults to "Player" if left blank)
• Your most-recently selected session length (30 seconds, 1 minute, or 3 minutes)
• Your most-recently selected difficulty (Low, Medium, or High)
• Your haptics on/off preference
• Personal-best scores for every (difficulty × duration) combination — 9 buckets total
• A short queue of completed-game scores awaiting Game Center submission

This data is removed when you delete the app.

iCloud Key-Value Store

When you are signed into iCloud on your iPhone, Qubun mirrors a subset of the items above into Apple's NSUbiquitousKeyValueStore service so they follow you across devices and reinstalls. Specifically: your player name, your most-recently selected duration and difficulty, your haptics preference, and the nine personal-best scores. Your language choice (Settings → Qubun → Language) is not synced — it stays per-device.

iCloud Key-Value Store is an Apple service governed by Apple's Privacy Policy. The data is end-to-end protected by Apple, transits Apple's servers, and is visible only to you across your own iCloud-signed devices. The developer cannot see it.

If you are not signed into iCloud, this sync is silently skipped and Qubun works entirely from local UserDefaults.

Game Center

Qubun integrates with Apple's Game Center for global leaderboards split by session length (30-second, 1-minute, 3-minute). Game Center is an Apple service governed by Apple's Privacy Policy. We do not control or have access to your Game Center identity beyond what Apple makes available to all Game Center-enabled apps (your public alias and submitted scores).

Authentication with Game Center is optional and deferred — it is only triggered when you tap the "Global Ranking" button on the Results screen, never on app launch.

Required-reason APIs (Apple Privacy Manifest)

The app declares the following Apple "required-reason" API categories in its bundled PrivacyInfo.xcprivacy:

• UserDefaults (reason CA92.1) — to store the local data listed above.
• File Timestamp (reason C617.1) — used indirectly by SpriteKit and CoreImage when loading game assets.

The privacy manifest declares NSPrivacyTracking = false and an empty NSPrivacyCollectedDataTypes array.

Children

Qubun is rated 4+ and is suitable for all ages. It is not opted into Apple's "Made for Kids" category — the in-app donation link to this website (which itself links to PayPal) would conflict with that category's parental-gate requirement.

Donations

The Results screen shows an optional text link to Qubun.martasdx.cz. From there a donation button takes you to paypal.me/martasdx. The donation flow is handled entirely by PayPal — we never see your payment information.

Changes to this policy

If the data-handling practices ever change, this page will be updated with a new "Last updated" date, and (where required) a notice will appear inside the app.

Contact

Questions? Email qubun@martasdx.cz.