Which Android app works best for blocking telemarketers and spam calls?

CallerID is a straightforward solution for users overwhelmed by telemarketing and spam calls. The app cross-references incoming numbers against a frequently updated spam database, displaying risk levels before answering. For small business owners receiving constant sales pitches, or individuals tired of daily robocalls, the automatic blocking feature saves time and reduces interruptions. Users report fewer disruptions during work hours and family time. The app also allows manual number blocking and maintains a whitelist for important contacts. However, some reviews note occasional false positives where legitimate calls get flagged. The interface includes a call log with spam identification tags, helping users quickly spot patterns. While the free version handles basic blocking, premium features offer more granular control. Battery impact remains minimal during testing, though the app requires ongoing permissions to screen calls effectively.