Hide Chat Screen: Privacy Mask, from PromptLabs Global, provides on-the-spot visual privacy for Android users in public settings. The app places a movable overlay over active apps so people can continue using their device while shielding specific content from view. Controls cover resize and opacity adjustments and include a quick activation shortcut plus a dimmer mode for low-light use. It targets commuters, office workers, and students who need fast protection against shoulder-surfing.

What the app actually places over running applications

The tool implements a system-level visual layer that sits above any active application, enabling targeted concealment of UI elements without switching apps. That overlay can be positioned and shaped to cover chat bubbles, comment threads, or side panels while keeping a video player or input field visible. Practical use cases listed by the developer include messaging apps, browsers, and banking screens, and a night mode option reduces screen brightness for low-light situations.

• Targeted masking for parts of the display
• Works on top of messaging, browser, and banking apps

Does it affect device performance during use?

According to the developer notes, the app is optimized to run in the background with minimal impact on system resources and battery life. That claim means typical use while commuting or working should not produce noticeable slowdowns on modern Android devices. Background operation avoids frequent context switches, so scans or heavy background tasks are not reported as part of its workflow.

Is it safe with respect to data and permissions?

The app functions as a visual overlay and typically does not require internet access or data-logging permissions to perform its primary masking role, so it does not collect screen contents for remote processing. Because it acts visually rather than intercepting input, it reduces the risk of additional data exposure from the masking utility itself. Users still rely on the underlying application for secure handling of credentials and messages.

Do I need technical knowledge to operate the mask correctly?

Design choices favor straightforward interaction: the developer emphasizes a non-intrusive approach that lets users adjust the mask in real time without leaving the current application. User feedback cited in the app listing highlights simplicity, so casual users can enable and move the mask on the fly. Advanced control is limited to manual placement and opacity tuning, so no specialist configuration is required.

A practical privacy tool best suited to people who use devices in public

Given positive user reception and its background-optimized design, Hide Chat Screen: Privacy Mask is a practical option for commuters and shared-space users who need quick visual protection from onlookers. The trade-off is that it only provides an on-screen barrier and does not change how underlying apps store or transmit data. Tip: enable the persistent notification toggle before entering crowded places to speed activation.