Privacy Policy

1. Information we collect

Delta Hub works with no accounts or sign-in and collects the minimum information needed:

• We don't create accounts or ask for your email, name or other personal data.
• A notifications token (FCM) generated by the device, so we can send you alerts if you enable them.
• An advertising identifier managed by Google AdMob to show ads.
• If you request an Onix key: device identifiers to limit it to one per day per phone. They are a random identifier shared with our Bublox and Nuviu apps on the same phone and the system identifier for this app (ANDROID_ID on Android, identifierForVendor on iOS). They travel encrypted (HTTPS), the server only stores their hash (SHA-256), and it is deleted automatically once the 24-hour window ends.
• Usage metrics and crash reports (Firebase Analytics and Crashlytics), with no personal identification.
• Your preferences, saved articles and the Delta tab history are stored ONLY on your device.

2. How we use the information

We use this information solely to:

• Show you the content (news, guides, videos) in your language.
• Send you news notifications if you've enabled them.
• Show ads that keep the app free.
• Enforce the one-Onix-key-per-day-per-phone limit and prevent abuse.
• Detect errors and improve stability and performance.

3. Advertising

Delta Hub shows ads through Google AdMob (banner, interstitial, rewarded and app open). In the European Union we show the UMP/GDPR consent before loading ads, and non-personalized ads are used for audiences that require it. On iPhone and iPad, the advertising identifier is only used if you accept Apple's tracking prompt (App Tracking Transparency); you can change it in Settings > Privacy & Security > Tracking. You can reset or limit the advertising identifier from your device settings.

4. Data sharing

We don't sell your data. Only these providers are involved, each with its own privacy policy:

• Firebase (Firestore for content, Messaging for notifications, Analytics and Crashlytics)
• Google AdMob (advertising)
• The Onix key server (MKDevs, the same as Bublox), which receives the device identifiers and only stores their hash to enforce the daily limit

5. Storage on your device

Your saved articles, preferences (language, theme, notifications) and the Delta tab key history are stored locally on your phone. You can delete them from the app itself (Settings) or by uninstalling the app; they are not uploaded to any server.

6. Children and families

Delta Hub is about Roblox, a game with a young audience, and it is an informational and entertainment content app. It is not directed exclusively at children under 13, nor does it knowingly collect personal data from minors. Advertising is adjusted by audience in line with applicable policies.

7. Your rights

Since there are no accounts, we don't store personal data of yours on a server except the notifications token and, if you request an Onix key, the hash of the device identifiers, which is deleted automatically once the 24-hour window ends. You can request deletion by writing to us, delete your local data from the app, and revoke permissions (notifications, tracking on iOS) from your device settings. More details on the "Delete data" page.

8. Contact

If you have questions about this privacy policy, contact us at:

mkdevs@mkdevsapp.com