PhoneBlock vs Should I Answer?

PhoneBlock is a free call-blocking service that uses a community-maintained database to identify unwanted advertising and spam calls. Users can report numbers through the app, website, or personal blacklist, and reports join the shared blacklist. The Android app blocks known spam calls, keeps call history, and supports reports and personal lists; it requires Android 10 or later. For incoming calls, the Android app sends only the phone number’s SHA-1 hash and does not access contacts.

Landline users can choose a router dongle, a Fritz!Box cloud answering machine, or a blocklist phonebook synchronized through CardDAV. The documented iPhone setup syncs spam numbers into contacts through CardDAV; a native iPhone app is in development, and beta registration is available. Phone systems can download the blocklist in different formats or query it through an API. PhoneBlock is licensed under GPL-3.0 and operated as a private project. The operator accepts email requests for help, including for mistakenly listed numbers. PhoneBlock costs nothing, with donations optional; its terms advise against business use.

Should I Answer? is a community-based service and mobile app for identifying and guarding against unwanted calls, telemarketing, and expensive outgoing calls. Its database combines community reviews with phone number ratings and is refreshed daily. On Android, the app can check a locally stored database without an internet connection and can optionally block unwanted calls automatically. The maker warns that automatic blocking may not work on every phone model. On iOS, number ratings appear in CallerID during calls or in Call History through the call blocking and identification extension. The service is also available on the web and as an extension. The Android app requires Android 4.1 or higher; Android 6 and newer require permissions for contacts, call information, and drawing over other apps. The Android manual says the local database stores phone numbers and statistics, while user reviews can be downloaded from the web service. The Android plan is free. An iOS automatic database updates plan has no listed price and includes a one-month trial period and free phone number information search.