Voice Calculator ("we," "our," or "us") is committed to protecting your privacy. This Privacy Policy explains how we collect, use, disclose, and safeguard your information when you use our mobile application Voice Calculator (the "App"). Please read this policy carefully. By using the App, you agree to the practices described here.

1. Information We Collect

1.1 Information Stored on Your Device

The App stores the following data locally on your device. This data is never transmitted to our servers because we do not operate any backend servers.

Data Type	Description	Retention
Calculation History	Mathematical expressions you enter and their results	Until you delete them or uninstall the App
Favorites	Calculations you mark as favorites	Until you remove them or uninstall the App
App Settings	Language, theme, speech rate, haptic preferences, wake word settings	Until you change them or uninstall the App
Subscription State	Whether your trial is active or you have an active subscription	Until subscription expires or App is uninstalled

1.2 Information Collected by Third-Party Services

While the App itself does not collect personal data, certain third-party services integrated into the App may collect information as described below.

2. How We Use Information

The locally stored information is used solely to provide the App's core functionality:

• Calculation History: Displayed in the history screen so you can review and reuse past calculations.
• Favorites: Allow quick access to frequently used calculations.
• App Settings: Remember your preferences across sessions.
• Subscription State: Determine whether to show ads and which features to enable.

3. Third-Party Services

3.1 Google AdMob (Advertising)

We use Google AdMob to display advertisements in the free version of the App. AdMob may collect and use the following information:

• Device advertising ID
• IP address
• Device model and operating system version
• App usage data for ad personalization

This data collection is governed by Google's Privacy Policy. AdMob data collection is completely removed when you subscribe to Voice Calculator Premium.

You can opt out of personalized advertising by visiting Your Ad Choices or adjusting your device's advertising ID settings.

3.2 Google Play Billing (Subscriptions)

We use Google Play Billing to manage subscriptions. Google Play processes all payment information. We do not have access to your payment card details, billing address, or any financial information. Google Play may collect:

• Payment method information (managed entirely by Google)
• Purchase history (for subscription verification)

This is governed by Google's Privacy Policy.

3.3 Google Speech Recognition

The App uses your device's built-in Android SpeechRecognizer for voice input. This service processes your speech in real-time and returns text results. Audio is handled by Google's speech recognition service and is governed by Google's Privacy Policy. The App:

• Does not record or store audio
• Does not transmit audio to any server controlled by us
• Only receives the text result of the speech recognition

3.4 Currency Exchange Rate API

The App fetches live currency exchange rates from a public API (open.er-api.com). Only the base currency code (e.g., "USD") is sent as a URL parameter. No personal information is transmitted. You can use the currency converter without an internet connection using cached rates.

4. Permissions

Permission	Purpose	Required?
INTERNET	Load advertisements, verify subscriptions, fetch currency rates	Yes
ACCESS_NETWORK_STATE	Check connectivity before network requests	Yes
RECORD_AUDIO	Voice input via microphone	Optional (only for voice feature)
VIBRATE	Haptic feedback on results and wake word detection	No
FOREGROUND_SERVICE	Keep wake word detection service running	Optional (only for hands-free mode)
FOREGROUND_SERVICE_MICROPHONE	Maintain microphone access for wake word detection	Optional (only for hands-free mode)

5. Data Sharing and Disclosure

We do not sell, trade, or rent your personal information to anyone. We do not share your data with any third party except as necessary to provide the services described in this policy (AdMob, Google Play Billing, Google Speech Recognition).

We may disclose information if required by law or in response to valid legal requests.

6. Data Security

We take reasonable measures to protect your information:

• Secure settings are encrypted using AES-256 encryption on your device
• All network communications use HTTPS (encrypted in transit)
• Cleartext (unencrypted) network traffic is explicitly disabled

However, please be aware that no method of electronic storage or transmission is 100% secure, and we cannot guarantee absolute security.

7. Data Deletion

You have full control over your data:

• Calculation History: Delete individual entries or clear all history from within the App's history screen.
• Favorites: Remove individual favorites from the favorites screen.
• All Data: Uninstalling the App removes all locally stored data including calculation history, favorites, settings, and subscription state.
• Cloud Backup: Your data may be included in Android's cloud backup. You can manage this in your device's backup settings.

8. Children's Privacy

The App is not directed to children under the age of 13, and we do not knowingly collect personal information from children under 13. If we become aware that we have inadvertently collected personal information from a child under 13, we will take steps to delete such information promptly.

9. Changes to This Privacy Policy

We may update this Privacy Policy from time to time. We will notify you of any changes by posting the new Privacy Policy on this page and updating the "Effective Date" at the top. You are advised to review this policy periodically for any changes.

10. Contact Us