Callfilter.app vs Who Called
Callfilter.app
callfilter.pedrorau.devWho Called
who-called.comSide by side
| Figure | Callfilter.app | Who Called |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | — | Yes |
| iOS | — | Yes |
| Android | Yes | Yes |
| Plans published | 1 | 1 |
| Spec score · Spam Call Blocking Apps | 8.2 (#7) | 7.4 (#23) |
| Spec score · Call blocker apps | 8.1 (#10) | 8.1 (#9) |
| Open source | The maker describes the project as open source and invites users to audit its code on GitHub. | The maker describes the app as open source and links to its public source-code repository. |
| Purpose | CallFilter is a call blocker for Android that automatically rejects incoming calls based on rules the user controls. | Who Called filters unwanted calls using an official telemarketer prefix list and community reports. |
| Support | The Play Store listing gives [email protected] as the support email. | Support is available by email in French or English, with a usual reply time of 48 business hours. |
Plans
In their own words
Callfilter.app
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.
Who Called
Who Called filters unwanted calls with an official telemarketer prefix list and community reports. Its Android and iOS apps can block risky numbers before the phone rings on Android, while uncertain numbers can ring with a warning. The website lets people check an unknown number’s reputation and report it. Reports can be submitted anonymously without an account. An optional SMS shield hides notifications from unwanted messages without storing or transmitting message content. The maker says the apps have no account, ads or third-party trackers, and that user data is not sold or shared. Personal blocking rules, settings and the local call-filter log stay on the device and are removed when the app is uninstalled. Lookups and reports send information to the service; lookups are not stored, while reports are retained for at most 365 days. The API is hosted in the European Union and uses HTTPS/TLS encryption. Who Called is open source, free at free, and support is offered by email in French or English.