You can maximize the security features of the Tuffer Voice Lock App and feel secure knowing that your device is well-protected by adhering to these guidelines and best preddit apkractices. 1. Is the Tuffer Voice Lock App compatible with all devices? This app works with the majority of contemporary Android and iOS smartphones and tablets. However, before downloading the app from the app store, make sure it works with your particular device. 2. Can several users set up different voice profiles on the same device?