What's the best Android app for screening unknown numbers and stopping telemarketer calls?

CallApp is a dedicated caller ID and spam blocking application that aims to reduce nuisance calls and improve phone security. It operates by cross-referencing incoming numbers with an extensive, crowdsourced database to display real-time caller information, such as names, locations, and business details. This functionality proves particularly useful for individuals who frequently receive calls from unknown sources, such as telemarketers or potential scammers, allowing them to decide whether to answer or block. The app includes automatic spam detection, customizable block lists, and call recording features. However, user feedback highlights some inconsistencies; for example, reviews indicate that call recording may occasionally fail, and a small percentage of spam calls can still penetrate the filters despite enabled protections. In practical scenarios, like when avoiding distractions during work hours or screening calls from new clients, CallApp's pop-up notifications provide immediate context. Its one-time payment model is a standout advantage compared to subscription-based alternatives, though it may lack some advanced integrations. While not flawless, CallApp balances core features with affordability, offering reliable performance for everyday users seeking to tame their call log.