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Welcome to DecibelPro: Sound dB Meter ("DecibelPro", "the Application", "we", "us", or "our"), developed and published by Hafiz Saad Digital. DecibelPro is available on Apple iOS (App Store ID: 6820814636) and Android (Google Play Package: com.saadapps.decibelpro).

By downloading, installing, accessing, or using DecibelPro, you agree to be bound by these Terms of Service ("Terms"). If you do not agree to these Terms, please do not download, install, or use the Application.

1. License Grant & Permitted Use

Subject to your compliance with these Terms, Hafiz Saad Digital grants you a revocable, non-exclusive, non-transferable, limited personal license to install and use DecibelPro on compatible mobile devices that you own or control, strictly for personal, informational, or educational purposes.

You agree not to:

• Decompile, reverse-engineer, disassemble, or attempt to derive the source code of the Application.
• Modify, adapt, translate, or create derivative works based upon the Application.
• Distribute, sublicense, lease, rent, or loan the Application or its assets to any third party.
• Bypass or attempt to circumvent any digital licensing, feature gates, or advertising controls in the Application.

2. Free Features, In-App Advertising & Rewarded Access

Free Core Features: DecibelPro provides real-time sound pressure level estimation (dBA), a digital audio waveform, min/max/average metrics, microphone calibration adjustment, saved measurement history, and a basic sine wave tone generator free of charge.

In-App Advertising: To support free access, the Application integrates the Google Mobile Ads (AdMob) SDK to display banner, interstitial, and app-open advertisements. We configure ad requests to adhere to family-safe advertising standards (Maximum Ad Content Rating G for general audiences) and proactively block mature, dating, gambling, and sensitive ad categories.

Rewarded Temporary Unlocks: You may voluntarily choose to watch rewarded video advertisements to temporarily unlock select capabilities (such as a 24-Hour VIP Pass, a CSV session export, custom visual themes, or the speaker cleaner tool). Rewarded unlocks are temporary, stored locally on your device, and do not represent a permanent purchase or transferable license.

3. In-App Purchases (Lifetime VIP Pass) & Restoration

Lifetime VIP Upgrade: DecibelPro offers an optional, non-consumable in-app purchase ("Lifetime VIP Pass", product ID com.saadapps.decibelpro.lifetime). Purchasing the Lifetime VIP Pass permanently removes all advertisements (banners, interstitials, and app-open ads) and permanently unlocks all pro presets, custom visual themes, the 165Hz speaker cleaner, and unlimited CSV history exports.

Restoring Purchases: If you reinstall the Application or switch to a new device on the same platform, you can restore your Lifetime VIP Pass at any time via the in-app "Restore In-App Purchases" button in Settings without additional charge.

Platform-Specific Scope (No Cross-Platform Transfer): In-app purchases are transacted through and tied directly to your Apple ID (on iOS via Apple StoreKit) or your Google Account (on Android via Google Play Billing). Because Apple and Google operate completely separate commerce systems, purchases made on iOS do not transfer to Android, and purchases made on Android do not transfer to iOS.

4. Billing, Store Rules & Refund Policy

All financial transactions, payment processing, sales tax, and currency conversions are handled exclusively by the respective application store platform (Apple Media Services for Apple devices, or Google Play for Android devices). Hafiz Saad Digital does not process, receive, or store your credit card numbers, billing addresses, or banking information.

Refunds: Because all payments are processed directly by Apple or Google, the Developer cannot issue refunds or adjust store billing records directly. All refund requests must be submitted directly to the store through which the purchase was made:

• Apple App Store (iOS): Request refunds through Apple's official portal at reportaproblem.apple.com.
• Google Play (Android): Request refunds through your Google Play account order history or via Google Play customer support in accordance with Google Play's standard refund policies.

5. Microphone Audio Handling, Local Storage & Home Screen Widgets

Microphone Audio Processing: DecibelPro requires microphone permission solely to measure sound pressure levels (SPL) in real time. Acoustic input is processed transiently in volatile device memory (RAM) to calculate amplitude values and frequency distributions. DecibelPro does not record, store, encode, or transmit raw audio to any server or third party.

Session Metadata & CSV Sharing: Measurement summaries (session timestamp, duration, average dB, peak dB, and minimum dB) are stored exclusively in your device's local storage. CSV file generation occurs locally on-device and is shared only through your deliberate interaction with the operating system share dialog.

Home Screen Widgets Data Sharing: On supported devices, DecibelPro shares a minimal summary of your most recent saved measurement (session identifier, average dB, peak dB, and timestamp) locally with the home screen widget extension via operating system shared storage (iOS App Group sandbox and Android local SharedPreferences). Widget extensions do not record audio, monitor ambient sound in the background, or transmit measurement summaries off your device. Deleting a measurement session or clearing history automatically updates or purges the shared widget data.

For complete details on data handling and advertising SDK disclosures, please review our Privacy Policy.

6. Acoustic Measurement Limitations & Disclaimer

• Hardware Variances: Digital sound readings depend on consumer smartphone and tablet microphones, which are engineered primarily for voice communication. Readings may be influenced by hardware tolerances, device orientation, protective phone cases, microphone port debris, and operating system automatic gain controls.
• Not a Certified Sound Level Meter: DecibelPro is not a certified Class 1, Class 2, Type 1, or Type 2 sound level meter under IEC 61672, ANSI S1.4, or equivalent metrological standards.
• No Legal or Regulatory Compliance Guarantee: Measurements provided by DecibelPro are software estimates and must not be relied upon for regulatory occupational safety compliance (such as OSHA or NIOSH workplace noise standards, industrial hygiene enforcement, or municipal noise ordinance citations), nor as verified evidence in formal legal or civil proceedings.

7. Tone Generator Precautions & Speaker Cleaner Limitations

• Auditory Safety: The tone generator synthesizes audio frequencies across the audible range (20 Hz to 20,000 Hz). Sustained high-volume or high-frequency sounds can cause auditory fatigue or hearing injury. You agree to use the tone generator responsibly at moderate volume levels, and you must never place device speakers directly against your ears or the ears of others during audio generation.
• Speaker Cleaner Limitations: The 165Hz speaker cleaner feature produces targeted acoustic pulse vibrations intended to help loosen surface moisture or light dust particles from speaker ports. DecibelPro does not guarantee the removal of trapped liquid or dust, does not repair damaged speakers, and does not provide waterproof protection. If your device has suffered liquid exposure, follow your device manufacturer's recommended drying instructions.

8. Intellectual Property

All copyrights, trademarks, service marks, visual designs, audio algorithms, user interfaces, and software code embodied within DecibelPro remain the exclusive property of Hafiz Saad Digital. All rights not expressly granted to you under these Terms are reserved.

9. Disclaimer of Warranties & Limitation of Liability

DecibelPro is provided on an "AS IS" and "AS AVAILABLE" basis without warranties of any kind, whether express, implied, statutory, or otherwise, including but not limited to implied warranties of merchantability, fitness for a particular purpose, non-infringement, or error-free operation.

To the maximum extent permitted by applicable law, Hafiz Saad Digital, its developers, and contributors shall not be liable for any direct, indirect, incidental, special, consequential, or punitive damages, including but not limited to loss of data, hearing damage, device hardware damage, or business interruption arising out of or related to your use of or inability to use the Application.

10. Changes to These Terms

We may update these Terms from time to time to reflect modifications in our features, operating system updates, or store policies. When changes are made, the "Last Updated" date at the top of this document will be updated. Your continued use of DecibelPro following the posting of updated Terms constitutes your agreement to the changes.

11. Developer Contact & Support

If you have questions, feedback, or support inquiries regarding these Terms or DecibelPro, please contact our developer desk directly:

• Developer: Hafiz Saad Digital
• Support Email: rajasaad707+decibelpro@gmail.com
• Developer Studio Website: https://rj707.github.io/
• DecibelPro Portal: https://rj707.github.io/decibel-pro/