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 enabled, notification appears 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