The Wuuj Android app stores your settings, categories, and lists locally on your device using Room. Selecting an audio file uses your device's file browser, and that file never leaves your device. Wuuj requests no Android permissions and sends no data off your device.

The Wuuj website uses Google Tag Manager for analytics corresponding to the usage of this website. Any data Google collects, Google stores and is subject to Google's privacy policy. The web server maintains logs of access to each page of this website, which include the date and time of access, the accessing IP address, the browser user agent, and the HTTP status code. Developers access these logs to troubleshoot connection issues.