Lie detector

LIE DETECTOR - FACE SCANNER & VOICE STRESS ANALYZER

Think you can spot a liar? Lie Detector uses your phone camera and microphone to scan facial expressions and voice stress in real time. Ask a question, let someone answer, and watch the AI deliver its verdict. The ultimate truth game for parties, family nights, and friend groups.

★ HOW THE LIE DETECTOR WORKS

Our face scanner analyzes eye movement, blink rate, head movement, gaze direction, and smile authenticity frame by frame. The voice stress analyzer detects volume variation, hesitation patterns, and vocal trembling. Both signals combine into a lie score from 0 to 100 with a verdict ranging from Definitely Truth to Definitely Lying.

Everything runs on your device. No face data, voice recordings, or biometric information is ever uploaded to any server.

★ MULTIPLAYER MODE — ARE THEY LYING?

The perfect party lie detector game. One player speaks a question using built-in voice recognition. The question appears on screen. The second player answers while the face scanner and microphone analyze simultaneously. Five seconds of real-time analysis produces an instant verdict. Play up to three rounds per session with a full results breakdown at the end.

★ SOLO MODE — AM I LYING?

Challenge yourself with the solo lie detector. Choose from seven question categories and let the app ask questions using text-to-speech in your language. Answer out loud and see if you can fool the AI face scanner.

★ QUESTION CATEGORIES

🍕 Food and Drink — Guilty food confessions

💕 Relationships — Secret crushes and social honesty

💼 Work and School — Professional truth test

🎮 Fun and Games — Playful guilty admissions

💰 Money — Financial honesty game

🌶 Spicy — Deep personal truth questions

🎲 Random Mix — Surprise questions from all categories

★ LIE DETECTOR FEATURES

✔ Real-time face scanner using on-device AI and machine learning

✔ Voice stress detection and analysis

✔ Speech recognition for spoken questions in multiple languages

✔ Automatic glasses detection with accuracy warning

✔ Session history with full per-question score breakdown

✔ Solo lie detector mode with text-to-speech questions

✔ Works completely offline — no internet required for scanning

✔ No account, login, or registration required

✔ Remove ads with a single one-time purchase

★ PRIVACY — YOUR DATA STAYS ON YOUR DEVICE

Lie Detector is built with privacy as the top priority. The face scanner processes camera frames locally using on-device machine learning. No video is recorded or stored. Voice analysis runs locally and temporary audio is deleted immediately after each scan. No biometric data ever leaves your device.

The free version shows ads via Google AdMob. Remove all ads permanently with a one-time in-app purchase.

★ HOW TO PLAY THE LIE DETECTOR GAME

1. Enter the player name on the home screen

2. Tap "Are THEY lying?" for multiplayer or "Am I lying?" for solo mode

3. Grant camera and microphone permissions

4. Speak a question — the face scanner activates automatically

5. The second player answers while the AI scans their face and voice

6. Get your lie detector verdict instantly

★ PERFECT FOR

Party games and group entertainment

Family game nights and truth challenges

Friend groups and social gatherings

Truth or dare alternatives

Icebreaker games and team activities

★ DISCLAIMER

Lie Detector is designed exclusively for entertainment and social fun. It is not a scientifically validated polygraph or deception detection instrument. Results have no scientific basis and must never be used to make real accusations or decisions about any person. By using this app you confirm your use is purely for personal entertainment among consenting adults.