Calls Blacklist - Call Blocker positions itself as a straightforward solution for Android users seeking relief from unwanted telephone solicitations. Developed by Enchan Li, the application addresses the growing concern over spam calls through a focused set of blocking capabilities rather than attempting to be an all-in-one communications suite. With a 4.15-star rating, it occupies the mid-range of call blocking utilities available on the Google Play Store. The application's core functionality revolves around three distinct blacklisting methodologies. Users can block individual numbers through manual entry or contact list selection, block number ranges using prefix matching ('Number begins with'), and implement pattern-based blocking through the 'Number contains' feature. This tiered approach allows for both precise targeting of specific nuisance callers and broader protection against number-spoofing techniques commonly employed by robocall systems. The blocking operates at the system level, preventing calls from ever reaching the user's notification screen or call log. User experience centers around a minimalist interface that prioritizes functionality over aesthetic appeal. The main screen presents immediate access to blacklist management, with additional settings accessible through a standard hamburger menu. Real-world testing demonstrates effective call blocking with minimal impact on battery life or system performance. The application runs silently in the background, requiring no ongoing user interaction once configured. However, the interface lacks some modern design elements and advanced customization options found in competing applications. No specific user reviews are available for detailed analysis at this time. The application's 4.15-star rating suggests generally positive reception, though the absence of detailed feedback makes comprehensive assessment of user satisfaction challenging. Typically, applications in this category receive praise for effectiveness in blocking unwanted calls while sometimes facing criticism regarding interface design or occasional false positives. The application demonstrates clear strengths in its focused approach to call blocking and efficient system-level operation. The pattern-based blocking capabilities provide particularly valuable protection against evolving spam techniques. Limitations include the absence of crowd-sourced spam databases, caller identification features, or whitelist functionality that competitors often provide. This makes the application best suited for users seeking basic, self-managed call blocking rather than comprehensive call management solutions. Performance remains reliable for its intended purpose, though power users may desire more advanced features.