HideU is a mobile application that allows users to hide their personal files, including photos, videos, and other items, in a hidden space with calculator password protection. The app also offers other features such as notes, a video player, a camera, and a private browser. Users can access their files by entering a digital PIN, and the app is disguised as a secret calculator to keep the private space hidden. The app also offers cloud service to back up personal data and files.

One of the main features of HideU is the ability to hide photos and videos in a safe media files vault. The app stores these files secretly and does not show them in any other photo album, gallery, or file manager. The app also offers a video player and built-in photo viewer, allowing users to play hidden videos and view hidden photos inside the calculator lock app.

Another feature of HideU is the private browser, which provides users with a secret and anonymous browsing experience. The app also offers app lock to prevent privacy from leaking to others. The icon of the application looks like an ordinary system calculator, and users can use it to perform calculations.

To use HideU, users need to enter their password on the calculator and press the '=' button to open the private space. If users forget their password, they can reset it by entering “11223344=” to verify their security question. The app does not copy or store users' photos and videos, and users should not uninstall the app, clear app data, or delete files and folders generated by HideU before backing up their personal data through cloud service.

Overall, HideU is a privacy-focused mobile application that offers users a secure way to hide their personal files and protect their privacy.