Updated: 30 September 2026
Block Crux: Block Puzzle Game (formerly Block Rush) is provided by M Imran Khan, operating as Motionbox (Google Play developer name: motionbox96). Contact: motionbox96@gmail.com. This policy covers the Android app with package name com.motionbox.blockrush.
YOUR GAME AND SETTINGS
Block Crux does not require an account. The app stores your current board, score, personal best, level, power inventory and settings on your device. We do not provide cloud saves, a cloud leaderboard or account synchronization. These local game records are not uploaded by the game. Android backup, if enabled on your device, may separately back up app data under your device and Google account settings.
The app does not request access to your contacts, photos, microphone, camera or precise location. It uses internet access for advertising and online services and vibration access for optional haptic feedback.
ADVERTISING
Block Crux uses Google AdMob for banner, interstitial and optional rewarded ads. Google and participating advertising partners may process your IP address (which can indicate approximate location), device and advertising identifiers, app/ad interactions, and diagnostic information. This supports ad delivery and measurement, personalization where permitted, service operation, fraud prevention and security. Advertising data is not necessarily anonymous.
Where applicable, Google's consent service presents advertising choices before ads can be requested. You can revisit available choices in Settings under Ad privacy choices. Availability of this option depends on Google's consent requirements for your region and device. Google may serve contextual or limited ads depending on your choices and applicable requirements. Advertising choices are separate from the optional analytics and crash-reporting settings below.
OPTIONAL USAGE ANALYTICS
The app includes Google Analytics for Firebase. In version 1.9.3 and later, usage analytics is off by default and only enabled when you turn on Share usage analytics in Settings. If enabled, Google may process app instance identifiers, app interactions such as sessions and screen views, device/app information, and approximate location derived from network information to help us understand usage and improve the game. The app disables Analytics advertising-ID collection and does not grant Analytics advertising storage, advertising personalization or advertising user-data consent. Turning analytics off stops further analytics collection and resets the local analytics identifier; it does not automatically delete data already received by Google.
OPTIONAL CRASH REPORTS
The app includes Firebase Crashlytics. In version 1.9.3 and later, crash reporting is off by default. If you enable Share crash reports in Settings, Firebase may receive crash logs, stack traces, app/device information and installation/session identifiers to help diagnose stability problems. The game does not attach your name, email or game board to crash reports. Turning this setting off stops further report uploads and discards unsent reports on the device. Older app versions initialized Firebase services without these in-game controls.
SUPPORT MESSAGES
If you email us, we receive your email address and the information you choose to include. We use this to respond, troubleshoot issues and handle privacy requests. Please avoid sending passwords, payment information or other sensitive information. Support email is optional and handled by your chosen email provider and ours.
PROVIDERS, DISCLOSURES AND SECURITY
Advertising information can be disclosed to Google and advertising partners for the purposes above. Google also processes enabled analytics and crash information for us. Information may additionally be disclosed if legally required or necessary to protect users and prevent abuse. Provider processing may take place outside your country. App SDK transmissions use encrypted connections; no system can guarantee absolute security.
Provider information:
Google privacy policy: https://policies.google.com/privacy
How Google uses information from apps: https://policies.google.com/technologies/partner-sites
Advertising controls: https://myadcenter.google.com/
Firebase privacy and security: https://firebase.google.com/support/privacy
Google Play services: https://policies.google.com/privacy
RETENTION AND DELETION
Local progress remains until you clear app data or uninstall the app, subject to any Android backup you have enabled. Uninstalling stops future app activity but does not automatically remove information already received by Google, advertising partners or email providers.
Provider records are retained according to the service's applicable settings and retention policies, including the Firebase and Google information linked above. Support correspondence is kept while needed to resolve your request and for any applicable legal obligations. We do not claim that all SDK information is retained for a single fixed period.
For access, correction or deletion requests concerning information you have supplied to us, email motionbox96@gmail.com with the subject Block Crux privacy request. We will review and respond to your request. Since the game has no user account and SDK records can use device or installation identifiers, we may be unable to identify particular provider records from an email address alone. You can also use Google's privacy controls and your Android advertising-ID and backup settings. Removing local app data deletes your saved game on that device.
CHILDREN
Block Crux is intended for users aged 13 and above and is not directed at children under 13. If you believe a child has supplied personal information to us, contact motionbox96@gmail.com so we can investigate and take appropriate action.
CHANGES AND CONTACT
We may update this policy when the app or its services change. The latest version and update date will be posted at the app's privacy-policy URL, accessible from Settings and Google Play. For support or privacy questions, contact M Imran Khan / Motionbox at motionbox96@gmail.com.