Lie Detector — Face & Voice Analysis App
This Privacy Policy describes how Lie Detector ("we", "our", "the App") collects, uses, and protects your information when you use our mobile application available on iOS and Android.
By downloading and using the App, you agree to the practices described in this Privacy Policy. If you do not agree with any part of this policy, please do not use the App.
Your camera and microphone data is never uploaded to any server. All facial and voice analysis happens entirely on your device in real time. We do not store, transmit, or share your biometric data in any form.
We are committed to collecting the absolute minimum data necessary to provide the App's functionality. Here is a complete breakdown:
| Data Type | Collected? | Where Stored | Purpose |
|---|---|---|---|
| Camera feed / video | ❌ Not stored | Device only (real-time) | Face expression analysis |
| Audio / voice recording | ❌ Not stored | Device only (real-time) | Voice stress analysis |
| Facial landmarks / biometrics | ❌ Not stored | Never persisted | Real-time scoring only |
| Session results (scores) | ✅ Locally only | Your device (ObjectBox) | History feature |
| Player names | ✅ Locally only | Your device | Session labeling |
| Purchase status (ads removed) | ✅ Locally only | Your device (SharedPrefs) | IAP verification |
| Advertising ID | ✅ By Google AdMob | Google servers | Ad personalization |
| Crash reports | ✅ Anonymous | Google servers | App stability |
| Name, email, account info | ❌ Never | N/A | Not required |
| Location data | ❌ Never | N/A | Not required |
The App requires access to your device's camera and microphone to function. Here is exactly how these permissions are used:
⚠️ Important: Revoking camera or microphone permissions will prevent the core scanning functionality from working. The App will display an appropriate error message in this case.
The App uses on-device machine learning to analyze facial expressions and voice patterns. This section explains exactly how this works:
All biometric processing is performed entirely on-device. We use Google ML Kit Face Detection API which operates locally. No facial images, facial landmark coordinates, voice recordings, or biometric templates are ever transmitted to our servers or any third party. The analysis results (a numerical score between 0–100) are stored locally in your session history.
The facial and voice analysis results are inherently approximate and are intended for entertainment purposes only. The scores do not represent scientifically validated biometric measurements.
The following data is stored locally on your device using ObjectBox (a local database) and Android/iOS SharedPreferences:
✅ Your data stays on your device. None of this locally stored data is synced to any cloud service, transmitted to our servers, or shared with any third party. Deleting the App will remove all locally stored data.
You can delete all stored session history at any time through Settings → Clear All History within the App. Uninstalling the App will also remove all locally stored data.
The free version of the App displays advertisements served by Google AdMob. This section explains what data AdMob collects and how it is used.
By default, Google AdMob may serve personalized advertisements based on your interests and browsing behavior. You can opt out of personalized advertising through your device settings:
You can permanently remove all advertisements by purchasing the Remove Ads in-app purchase. Once purchased, no ad-related data collection will occur within the App. Your purchase status is stored locally on your device.
For more information about Google AdMob's data practices, please review Google's Privacy Policy.
The App offers a single non-consumable in-app purchase: Remove Ads (Product ID: com.gamesoft.lie.detect.remove.ads).
All payment processing is handled exclusively by Apple App Store (iOS) or Google Play Store (Android). We do not collect, process, or store any payment information, credit card details, or billing information.
If you reinstall the App or switch devices, you can restore your previous purchase through the Settings → Restore Purchases option. Restoration is handled by Apple/Google and does not require you to pay again.
Refund requests are handled by Apple App Store or Google Play Store according to their respective refund policies. We do not process refunds directly.
The App integrates the following third-party services. Each has its own privacy policy governing the data it collects:
| Service | Purpose | Data Collected | Privacy Policy |
|---|---|---|---|
| Google ML Kit | On-device face detection | None (on-device only) | Google Privacy |
| Google AdMob | Advertising | Ad ID, device info, IP | Google Privacy |
| Apple App Store / Google Play | In-app purchases | Payment info (by platform) | Platform policies |
| Flutter TTS | Text-to-speech (Solo Mode) | None (on-device only) | N/A (on-device) |
| Speech-to-Text APIs | Question & answer recognition | Voice data (platform API) | Platform policies |
Note on Speech Recognition: When using speech-to-text functionality (for speaking questions or detecting answers), your voice may be processed by Apple's or Google's on-device or cloud-based speech recognition services. Please refer to their respective privacy policies for more information.
The App is intended for users aged 13 years and older (or the minimum age required by applicable law in your jurisdiction). 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.
Depending on your location, you may have certain rights regarding your personal data. Since virtually all App data is stored locally on your device, you have direct control over most of your data.
To exercise any of these rights or for data-related inquiries, please contact us using the information provided in the Contact section.
We take the security of your information seriously, even though the majority of your data never leaves your device.
While we implement strong security practices, no method of data storage or transmission is 100% secure. We encourage you to keep your device's operating system and the App updated to benefit from the latest security patches.
We may update this Privacy Policy from time to time to reflect changes in our practices, technology, legal requirements, or other factors.
If you have any questions, concerns, or requests regarding this Privacy Policy or our data practices, please do not hesitate to contact us.
We aim to respond to all privacy-related inquiries within 72 hours.
📧 privacy@liedetectorapp.com