Privacy Policy

Last updated: June 16, 2026

Introduction

This Privacy Policy applies to the mobile application Voice Math – Mental Arithmetic (com.spacemathtrainer), developed by Davud Zulumkhanov ("we", "our", or "the developer"). We are committed to protecting your privacy. This Privacy Policy explains how we collect, use, and safeguard your information when you use our application.

Information We Collect

1. Audio Data

Voice Input: The app uses your device's microphone to capture voice input for speech recognition.
Processing: Audio is processed by Google Speech Recognition API for converting speech to text.
Storage: We do NOT store or transmit your audio recordings. Audio is processed in real-time and immediately discarded.

2. Progress Data

Test Results: We store your test scores, accuracy, and completion times locally on your device.
Storage Method: All progress data is saved using Android SharedPreferences on your device only.
No Cloud Storage: Your data is NEVER uploaded to external servers or cloud storage.

3. Technical Data

Device Identifier: We generate a random anonymous identifier (UUID) on first launch to support license activation. This identifier is not linked to your personal identity or hardware.

Important: All your data stays on YOUR device. We don't collect, store, or share your personal information with third parties.

How We Use Your Information

We use the collected information solely for:

Providing speech recognition functionality
Tracking your learning progress
License verification for premium features

Third-Party Services

The app uses the following third-party services:

Google Speech Recognition API

Used for converting voice input to text
Subject to Google's Privacy Policy
Audio is processed by Google's servers but not stored

Google Text-to-Speech

Used for voice output
Subject to Google's Privacy Policy

Google Play Billing

Used for in-app purchases (Premium unlock)
Subject to Google's Privacy Policy

Data Security

All data is stored locally on your device using encrypted storage
No user accounts or authentication required
No data transmission to external servers (except for speech processing and license verification)
Data is deleted when you uninstall the app

Children's Privacy

Voice Math – Mental Arithmetic is designed for educational purposes and may be used by children. We do not knowingly collect personal information from children. All data processing is done locally on the device.

COPPA Compliance: This app does not collect, store, or share any personal information from children under 13.

Your Rights

You have the right to:

Delete all your data by uninstalling the app
Reset your progress through the app settings
Use the app without providing audio input (button mode available)

Changes to This Policy

We may update this Privacy Policy from time to time. We will notify users of any changes by updating the "Last updated" date at the top of this policy.

Contact Us

If you have questions about this Privacy Policy, please contact the developer:

Developer: Davud Zulumkhanov

App: Voice Math – Mental Arithmetic

Email: davud58@gmail.com

Consent

By using Voice Math – Mental Arithmetic, you consent to this Privacy Policy.