Lie Detector Test: Truth Prank
Fingerprint Scanner Polygraph
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Catch them red-handed! Put a finger on the scanner, ask the juicy question, and watch the TRUTH or LIE verdict drop. Secretly rig results in Customize Mode. Prank away!
Is your friend telling the TRUTH… or a total LIE? Place a finger on the scanner, ask any question, and let the Lie Detector Test deliver the verdict — the ultimate party prank!
Your phone becomes a hilarious polygraph simulator: an animated fingerprint scanner, a racing waveform, radar rings, a heartbeat countdown, dramatic scanning sounds and haptics… and then the glowing verdict drops: TRUTH or LIE. Their face in that moment? Priceless.
YOU SECRETLY CONTROL THE VERDICT
• Customize Mode: pre-set the next results in any order before you hand the phone over
• Random Mode: a genuine 50/50 for real suspense
• They'll never know it was rigged — that's the prank
THE ULTIMATE PARTY GAME
• Loyalty tests for couples and best friends
• Sleepovers, game nights, road trips, April Fools and family gatherings
• Truth-or-dare nights: ask the juicy questions — "Do you have a crush?" "Who ate my snack?"
• Film the reveal — the reactions are made for TikTok, Reels and Shorts
FEELS SCARY REAL
• Realistic fingerprint scanner with a suspenseful press-and-hold
• Animated polygraph waveform, radar rings and countdown
• Immersive sound effects and haptic vibrations
• A dramatic, glowing TRUTH or LIE reveal
WHY YOU'LL LOVE IT
• Prank in seconds — no setup, no sign-up
• Slick sci-fi neon design
• Endless laughs, every single time
GO PRO
Remove all ads for a smooth, uninterrupted prank. Pro is an auto-renewable subscription; payment is charged to your Apple Account at confirmation of purchase. It renews automatically unless cancelled at least 24 hours before the end of the current period; manage or cancel anytime in your Apple Account settings. The weekly plan starts with a 7-day free trial that converts to a paid subscription unless cancelled.
DISCLAIMER
Lie Detector Test is a prank and entertainment app for fun only. It does NOT detect real lies or truth and does not read fingerprints or any biometric data — every result is random or pre-set by you, purely for entertainment. Always let your friends in on the joke!
Privacy Policy: https://thirtythreeapps.com/ios-lie-detector-test-privacy-policy
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Download Lie Detector Test now — scan a finger, reveal the verdict, and find out who's REALLY lying!
• Improved Functionality
• Refreshed App Store listing
The developer, Thirty Three Apps, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Location
- Identifiers
- Usage Data
Data Linked to You
The following data may be collected and linked to your identity:
- Location
- Identifiers
- Usage Data
- Diagnostics
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Thirty Three Apps SIA
- Size
- 29.1 MB
- Category
- Entertainment
- Compatibility
Requires iOS 16.0 or later.
- iPhone
Requires iOS 16.0 or later. - iPad
Requires iPadOS 16.0 or later. - Mac
Requires macOS 13.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Weekly Subscription $9.99
- Monthly Subscription $29.99
- Copyright
- © 2026 Thirty Three Apps