# Privacy Policy for Dad of Math: Mental Math Drill
**Developer / Company:** SOHA DEV
**Website:** https://sohadev.in
**Contact Email:** support@sohadev.in
**Effective Date:** October 2026
At **SOHA DEV**, we are committed to protecting the privacy of our users. This Privacy Policy outlines how **Dad of Math: Mental Math Drill** handles information.
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### 1. 100% Offline Architecture & Zero Personal Data Collection
**Dad of Math** is built as an offline-first educational and speed mathematics utility. We do not collect, store, sell, or transmit any personally identifiable information (such as your name, phone number, email address, contacts, or precise physical location).
### 2. Local Storage on Device
All user progress data—including daily streaks, calculation speed metrics (Operations Per Minute), drill scores, trophy achievements, and custom preferences—is stored **locally on your device** via local storage. This data never leaves your device and is erased if you uninstall the application or choose to clear app data.
### 3. Device Permissions & Usage
Our application requests only the minimum device permissions necessary to deliver core features:
- **Internet & Local Wi-Fi Access (`INTERNET`):** Used to power real-time 1v1 multiplayer duels and local Wi-Fi battles, synchronizing math quiz questions and player scores between devices via lightweight, encrypted WebSockets/MQTT communication. We do not track user IP addresses, scan local networks, or transmit any personally identifiable information (PII) over the network.
- **Vibration / Haptic Feedback (`VIBRATE`):** Used solely to provide tactile touch confirmation and sensory feedback when tapping math keypad buttons, selecting answers, and triggering combo streaks.
- **Local Notifications (Optional):** Used strictly on-device to trigger daily practice streak reminders (e.g., at 8:00 AM) if enabled in settings. We do not use remote push servers or external advertising services.
### 4. Third-Party Services & Analytics
Like most mobile applications distributed via the Google Play Store, the application may utilize standard Google Play Core services strictly for crash diagnosis and performance reliability. No personally identifiable financial or calculation data is tracked or shared.
### 5. Children’s Privacy (COPPA & GDPR Compliance)
Dad of Math features an "Academy Mode" designed for primary school students, kids, and learners of all ages. Because our application does not collect any personal information whatsoever, it is fully compliant with the Children's Online Privacy Protection Act (COPPA) and international child privacy regulations.
### 6. Changes to This Privacy Policy
We may periodically update our Privacy Policy. Any updates will be posted directly to this page with an updated effective date.
### 7. Contact Us
If you have any questions, feedback, or suggestions regarding this Privacy Policy or Dad of Math, please contact us at:
**Email:** support@sohadev.in
**Developer:** SOHA DEV