App Blocker: Curbox Detox

App Blocker: Curbox Detox is an open-source Android app for blocking distracting apps and websites while tracking screen time. It is intended for people who want practical controls for digital wellbeing, focused work, study, or a digital detox. In the MirrorNest catalog, it belongs to the System Tools category.

Users can block an app or an entire website, or use URL path blocking to restrict only a specific part of a site. This can be used for areas such as YouTube Shorts, Instagram Reels, or other short-form content without necessarily blocking the rest of the service. Tamper Protection makes it more difficult to uninstall the app or disable its blocking service, while Settings Change Delay can postpone weaker rule changes and provide time to reconsider them.

Granular UI Hiding removes selected distracting areas from an app with an overlay while leaving other parts available. For example, it can hide a YouTube home feed, an Instagram Explore tab, or a broader feed while allowing other content to remain accessible. Focus Mode pauses selected apps and websites for a set period, and Scheduled Do Not Disturb can activate automatically during chosen hours. App-specific grayscale reduces color in selected apps, while Scheduled Usage Limits set when a group is active and how much use is available during that period.

Curbox Detox also provides Mindful Messages as overlay reminders while an app is in use, along with Attention Span Tracking for short-form video sessions. Usage Analytics show how much time is spent in each app and website, and Focus Statistics record focus sessions and progress. MirrorNest distributes the official Android build directly from its own storage rather than repackaging it, and scans the build for malware before publishing it.