Privacy Policy

Last updated: October 11, 2026. Kazudo (Better Than Sudoku) is a puzzle app. It collects only what it needs to work.

What stays on your device

Your progress, notes, current game and settings are stored locally. An account secret is kept in the device Keychain.

What is sent to our servers

• An anonymous account identifier, created on first launch.
• Your username (public), avatar and colour.
• Your puzzle results (time, errors, hints, score), streaks and badges, used for the leaderboard and your league.
• Your friend requests and friends list.
• Recoverable games (a backup of your game in progress).
• Messages you send through “Send feedback”.
• If you sign in with Apple: the app-specific Apple identifier. We do not receive your name or email address.

What we do not do

No ads, no tracking, no third-party analytics, no selling or sharing of data.

Purchases

Purchases are handled by Apple. We never see your card or payment details.

Hosting

Data is hosted by Supabase. All traffic is encrypted (HTTPS).

Retention and deletion

Your data is kept as long as your account exists. In the app: Profile, Account, Delete my account erases your account and all associated online data immediately and permanently. Local progress stays on your device until you uninstall the app. You can also request deletion through the Data Deletion page.

Your rights

You can request access, correction or deletion of your data at any time: contact@nicolasgiannantonio.com

Children

The app is not intended to knowingly collect data from children under 13. Your username is public: do not put personal information in it.

Changes

Any significant change will be announced in the app and on this page.

Data controller

Nicolas Giannantonio, contact@nicolasgiannantonio.com