Privacy Policy

Effective date: 7 May 2026

Sumzi is a daily numbers puzzle game. This Privacy Policy explains what information we collect, how we use it, how some information may be shown within the app, and how you can contact us.

1. Information We Collect

When you create or use a Sumzi account, we may collect and store the following information:

Your password is used to let you log in securely. We do not use your password for any other purpose, and your password should not be stored by Sumzi in plain text.

2. How We Use Your Information

We use your information to:

3. Public or Shared Information

Some information may be visible to other Sumzi users as part of the app’s leaderboard, friends, profile and achievement features.

This may include:

Your email address and password are not shown to other users.

4. Third-Party Services

We do not sell your personal information.

We may use trusted service providers to help operate Sumzi, such as authentication, database hosting, app hosting, email delivery, app store services, diagnostics, push notification delivery, advertising services or similar technical services.

These providers only process information as needed to provide and support the app.

If advertising features are enabled in the future, third-party advertising partners may process certain information from your device or app usage to deliver, measure and improve ads, depending on your device settings, consent choices and the type of ads being shown.

5. Marketing Emails

Sumzi does not currently send marketing emails.

If this changes in the future, we will update this Privacy Policy and provide appropriate controls where required.

6. Notifications

Sumzi may offer optional notifications, such as reminders to complete the daily challenge.

Notifications are only sent where permitted by your device settings and, where available, your in-app notification preferences.

You can control or disable notifications through your device settings. If Sumzi provides in-app notification toggles, you may also be able to adjust which types of notifications you receive from within the app.

7. Advertising, Analytics and Tracking

Sumzi does not currently show ads to users.

However, Sumzi may include advertising functionality that can be enabled in the future. If enabled, ads may be shown in parts of the app, such as after completing a daily puzzle or within practice mode.

Ads may be provided by third-party advertising partners. These partners may receive or use certain information from your device or app usage to deliver, measure and improve ads, depending on your device settings, consent choices and the type of ads being shown.

This may include information such as device identifiers, advertising identifiers, IP address, general location information, app interaction information, ad views, ad clicks, approximate usage data, crash logs, performance data and diagnostic information.

Where required, Sumzi will ask for permission or provide relevant controls before using advertising features that involve tracking or personalised ads.

Sumzi does not sell your personal information.

If advertising, analytics or tracking features are enabled or expanded in the future, this Privacy Policy and the relevant App Store and Google Play privacy information will be updated where required.

8. In-App Purchases and Paid Features

Sumzi does not currently offer in-app purchases, subscriptions or paid digital features.

We may add optional in-app purchases, subscriptions or paid features in the future, such as cosmetic items, ad removal, expanded practice features or other optional upgrades.

If in-app purchases, subscriptions or paid features are added, they will be processed through the relevant app store provider, such as Apple App Store or Google Play. Sumzi will not directly collect or store your full payment card details.

If paid features are introduced, this Privacy Policy and the relevant App Store and Google Play information will be updated where required.

9. Data Security

We take reasonable steps to protect your information.

Passwords should be handled securely through authentication systems and should not be stored in plain text.

However, no method of electronic storage or transmission over the internet is completely secure, so we cannot guarantee absolute security.

10. Account Deletion

You can delete your Sumzi account from within the app by going to Settings and using the Delete Account option.

You may also contact us at hello@sumzi.app to request help with account deletion.

When your account is deleted, personal information linked to your account, including your email address, account details, gameplay history, stats, streaks, friends and achievements, will be deleted or anonymised unless we are required to keep certain information for legal, security or operational reasons.

11. Children

Sumzi is not intended to knowingly collect personal information from children where parental consent would be required by law.

12. Changes to This Privacy Policy

We may update this Privacy Policy from time to time.

If we make significant changes, we may notify users in the app or by updating this page.

13. Contact Us

If you have any questions about this Privacy Policy, contact us at:

hello@sumzi.app