Last updated: July 3, 2026

Jakub Kajfosz ("I", "me", "my") built the Antimatter Dimensions app for Android. This privacy policy explains what information the app handles, how it is used, and the choices you have. It applies to the Antimatter Dimensions app distributed through the Google Play Store.

The app is free to download and is supported by advertising and optional in-app purchases. By using the app, you agree to the practices described in this policy. If you do not agree, please do not use the app.

Information the App Handles

Your game progress ("save data") is stored locally on your device by default. You are not required to create an account to play.

Depending on how you use the app, the following information may be processed:

• Account information — if you choose to create an account or sign in (see "Accounts & Cloud Saves" below), your email address and authentication identifiers are processed to manage your account.
• Cloud save data — if you use cloud saving, your game progress is uploaded and stored on Google Firebase servers so it can sync across devices.
• Purchase records — records of in-app purchases (such as which items you have bought) are stored and associated with your account so purchases can be restored.
• Google Play Games data — if you sign in with Google Play Games, your Play Games identity is used to unlock and sync achievements.
• Advertising & device identifiers — advertising services may collect your advertising ID and similar data to serve and measure ads.
• Diagnostics & usage data — crash reports and anonymous usage/analytics data help me find bugs and improve the app.

Accounts & Cloud Saves

The app offers an optional account so you can back up and sync your progress and restore purchases. Accounts are provided through Firebase Authentication and can be created with an email address and password, or by using Sign in with Google (via Android's Credential Manager). When you create an account, your email address and a unique account identifier are stored. When cloud saving is enabled, your save data and purchase records are stored on Google Firebase servers under your account identifier.

Using an account is entirely optional. If you never sign in, your progress stays on your device and is not uploaded to my servers.

Google Play Games

The app integrates Google Play Games Services. If you sign in with Google Play Games, your Play Games profile is used to record and synchronize in-game achievements. This feature is optional, and its use of your data is governed by Google's privacy policy.

Advertising

The app displays advertisements through Google AdMob. AdMob may collect and use your device's advertising ID and other data to deliver and measure ads. You can reset or delete your advertising ID, or opt out of ad personalization, in your device's Settings → Google → Ads.

Where required (for example, in the EU and UK), the app uses Google's consent management (User Messaging Platform) to request your consent for personalized advertising. You can review or change your ad consent choices within the app or your device settings.

Analytics & Crash Reporting

The app uses Google Analytics for Firebase to understand how the app is used (in aggregate) and Firebase Crashlytics to receive crash and error diagnostics. This helps me fix problems and improve the experience. Crash reports may include information such as device model, operating system version, app configuration and state at the time of the error, and timestamps.

In-App Purchases

In-app purchases are processed by Google through the Google Play Store using Google Play Billing. I do not receive or store your payment card details; Google handles payment processing. A record that a purchase was made is stored with your account so it can be restored on your devices.

Log Data

When you use the app, and especially in the case of an error, data and information may be collected (through third-party products) that can include your device's Internet Protocol ("IP") address, device model and name, operating system version, the configuration of the app when using the Service, the time and date of your use, and other diagnostics.

Third-Party Services

The app uses third-party services that may collect information used to identify you. Their handling of your data is governed by their own privacy policies:

• Google (Google Play Services, Play Games, Firebase — Authentication, Realtime Database, Analytics, Crashlytics)
• Google AdMob
• Google Analytics for Firebase
• Firebase Crashlytics
• Google Play (Store & In-App Billing)

Cookies & Identifiers

Cookies are files with a small amount of data that are commonly used as anonymous unique identifiers. This Service does not use cookies explicitly. However, third-party code and libraries used by the app (such as advertising and analytics providers) may use cookies or similar identifiers to collect information and improve their services. You can control certain identifiers and tracking through your device settings.

Your Rights & Choices

Depending on where you live (for example, under the GDPR in the EU/UK or the CCPA in California), you may have the right to access, correct, or delete personal information I hold about you, to object to or restrict certain processing, and to withdraw consent. To exercise these rights, contact me at antimatter.dimensions@gmail.com.

Data Retention & Account Deletion

Cloud save and account data are retained while your account is active. You can request deletion of your account and associated data at any time. For instructions, see the Account Deletion page or email me at antimatter.dimensions@gmail.com. Save data stored only on your device is removed when you delete the app.

Security

I value your trust in providing your personal information and strive to use commercially acceptable means of protecting it. However, no method of transmission over the internet or method of electronic storage is 100% secure, and I cannot guarantee its absolute security.

Links to Other Sites

This Service may contain links to other sites. If you click a third-party link, you will be directed to that site. These external sites are not operated by me, and I strongly advise you to review the privacy policy of any website you visit. I have no control over, and assume no responsibility for, the content, privacy policies, or practices of any third-party sites or services.

Children's Privacy

This Service does not address anyone under the age of 13. I do not knowingly collect personally identifiable information from children under 13. If I discover that a child under 13 has provided me with personal information, I will delete it from my servers. If you are a parent or guardian and are aware that your child has provided personal information, please contact me so that I can take the necessary action.

Changes to This Privacy Policy

I may update this Privacy Policy from time to time. You are advised to review this page periodically for any changes. I will notify you of any changes by posting the new Privacy Policy on this page, with an updated "Last updated" date. Changes are effective immediately after they are posted.

Contact Us

If you have any questions or suggestions about this Privacy Policy, do not hesitate to contact me at antimatter.dimensions@gmail.com.