What's the best iOS app for blocking spam calls and identifying unknown numbers?

Call ID is an iOS application designed to handle spam calls and identify unknown numbers, making it a practical tool for everyday phone management. Its real-time caller identification feature cross-references incoming numbers with extensive databases to display names and locations before answering, which is particularly useful for screening potential telemarketers or scammers. Users can create customized block lists to automatically reject calls from specific numbers or entire categories, such as international or private callers. The app's settings are highly praised for their intuitiveness, allowing quick adjustments to whitelist contacts or enable silent mode for blocked calls. Reviews indicate that many users find the app trustworthy, with one noting, 'This app has completely stopped all the spam calls I used to get.' In real-world scenarios, like when receiving frequent unknown calls during work hours or while traveling, Call ID reduces interruptions and enhances privacy. However, some limitations include occasional false positives where legitimate calls might be blocked, and the free version may have restricted features compared to premium tiers. Despite this, its consistent performance and user-friendly design make it a reliable choice for iOS users seeking to minimize unwanted calls.