Callfilter.app vs Corta Spam
Callfilter.app
callfilter.pedrorau.devCorta Spam
github.comSide by side
| Figure | Callfilter.app | Corta Spam |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Android | Yes | Yes |
| Plans published | 1 | 1 |
| Spec score · Spam Call Blocking Apps | 8.2 (#7) | 7.6 (#19) |
| Spec score · Call blocker apps | 8.1 (#10) | 7.5 (#22) |
| Purpose | CallFilter is a call blocker for Android that automatically rejects incoming calls based on rules the user controls. | Corta Spam screens incoming calls against user rules before the phone rings, then lets them ring, blocks them, or answers with a greeting. |
| Support | The Play Store listing gives [email protected] as the support email. | The maker provides support by email at [email protected] or through a GitHub issue. |
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.