Callfilter.app vs YouMail

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.

YouMail combines call protection, privacy tools, and visual voicemail for Android, iOS, and the web. It is intended to block robocalls and scammers and help keep a phone number private. Visual voicemail transcribes messages to text and is accessible on mobile and desktop. The Free plan costs nothing and includes 50 cloud messages, 100 voicemail-to-text transcriptions per month, and unlimited known-spammer blocking. Paid personal plans include unlimited call screening; the Free plan does not list that feature. For business use, Complete and Ultimate list virtual numbers and tools such as auto attendant, extensions, conference call recording, and business messaging. YouMail also lists voicemail notifications or transfers to Slack, Asana, Dropbox, Google Drive, and Trello. The company says it encrypts data at rest and in transit and describes vulnerability scans, code reviews, and third-party security audits and penetration tests in its development process. It works with major carriers including AT&T, T-Mobile, Verizon, Ting, and Mint.