What's the best iOS app for identifying unknown callers before answering?

Truecaller is a comprehensive caller identification app that addresses the common need to see who's calling from unknown numbers. For anyone receiving frequent calls from telemarketers, new clients, or delivery services, this app provides real-time insights by showing the caller's name and potential spam status as the phone rings. It uses a crowdsourced database that continuously updates, ensuring accurate identification across various regions and contexts. Key features like automatic caller ID, spam blocking, and the ability to save identified contacts directly make it practical for daily use. In scenarios such as screening business calls or avoiding fraud, Truecaller reduces uncertainty and improves communication safety. However, reviews indicate some drawbacks: the free version includes advertisements, which can be intrusive, and occasional glitches may require manual searches for caller information. Additionally, the premium subscription, priced around $80 annually, offers an ad-free experience and extra features like profile view notifications, but some users find it expensive. Despite these limitations, Truecaller's reliability in identifying unknown callers and blocking spam has made it a go-to tool for many iOS users, balancing functionality with minor imperfections.