Android-CBlock Android application to block annoying incoming calls: Add phone in block list in 3 clicks: Click floating button add Select phones from incoming calls list and click done Click switch Block Service When Service is enabled, notification appears at the system bar. How to install Please use app/app-release.apk file Used language and libraries Kotlin - do more with less lines of code RxJava, RxAndroid - the core of MVVM architecture Dagger - dependency injection framework SQLBrite - wrapper around ContentResolver, to get incoming calls list GreenDao - ORM, to save blocked phone's numbers in local DB