Callfilter.app vs Hiya Spam Blocker

Callfilter.app is an Android app that blocks incoming calls according to rules set by the user. It can reject 8-digit numbers, numbers on a personal list, custom-pattern matches, or all incoming calls. Custom matching supports regular expressions, and users can choose to receive a notification when a call is rejected. CallFilter checks calls on the device through Android’s CallScreeningService API, using a local SQLite-based rule engine without remote database lookups. The maker describes it as offline, with no accounts or tracking. Its privacy policy says the app does not send personal data to external servers and does not use third-party SDKs, advertising networks, or tracking libraries. The app is free and open source, and the maker invites users to audit or contribute to the project on GitHub. It filters calls according to the user’s settings; it does not replace the phone app. The Play Store listing warns that some features may not work correctly on Samsung devices running Android 12 or later.

Hiya Spam Blocker is an Android and iOS app for identifying unknown callers and screening or blocking unwanted spam, telemarketing, and robocalls. Its free version provides spam and fraud alerts, caller ID for known businesses and spam numbers, spoof protection settings, and blocking settings. Premium adds automatic call blocking, reverse number lookup, enhanced caller ID, Call Screener, and more frequent spam updates on iPhone. Premium costs $3.99 a month or $24 a year, and a 7-day trial is listed. Features vary between platforms: automated call screening is listed for iOS, while visual voicemail is listed for Android. Call Screener requires Premium and is available in the US and Canada on supported carriers; Android requires one active SIM. Individual non-business number identification is a Premium feature and is unavailable in Europe due to privacy regulations. Hiya also describes real-time voice analysis that warns about suspected deepfake voices during calls. It says newly emerging or spoofed spam numbers may initially go unflagged, and withheld numbers cannot be individually identified or blocked.