Houdini vs DeceptionDetection

Watch Chris Korn explain one of Houdini's most famous illusions

Explore your body's signals. This app uses your device’s camera to estimate heart-related signals (BPM) and visualize how they change during short, guided yes/no prompts. It’s a simple, game-like biofeedback experience designed to help you notice patterns in arousal and relaxation. Start with three neutral prompts to establish a baseline. Then answer three general prompts to observe how your BPM may shift. The app charts these changes to support awareness and reflection—no interpretations about truthfulness. Whether you’re sharing a lighthearted session with friends, practicing calm responses, or exploring your own physiology, this app offers a unique way to experience pulse-based biofeedback. Features - Real-time heart rate estimation using your device camera - Baseline calibration followed by gentle “challenge” prompts - Interactive, session-based biofeedback visuals - Solo or shared session modes - No wearables or extra hardware required Wellness Notice This app provides wellness biofeedback and does not determine truthfulness. It is not a lie detector, polygraph, or medical device and should not be used for decision-making, diagnosis, or any legal purposes. Subscription Details Unlock unlimited sessions and full access with Pro: - Weekly Plan: £0.99 per week - Annual Plan: £19.99 per year (Save over 60%) Your subscription will be charged to your Apple ID account at confirmation of purchase and will renew automatically unless canceled at least 24 hours before the end of the current billing period. Manage or cancel your subscription anytime in your App Store account settings. Privacy Policy: https://deceptiondetection.co.uk/privacy Terms of Use: https://deceptiondetection.co.uk/terms Support: https://deceptiondetection.co.uk/contact