A new device, priced at $9, uses NFC technology to require users to physically scan a key before unlocking certain apps on their phone. This approach aims to help individuals manage their time and reduce distractions caused by addictive mobile applications. The device's functionality is based on the need for a physical interaction, rather than a digital one, to access locked apps. Users can select which apps are subject to this restriction. The device's affordability and simplicity may make it an attractive option for those seeking a more hands-on approach to mobile app management.