Spam Call Blocker, Call Filter and Caller id in a single app free app - CallMaster. CallMaster blocks spam calls and the following types of flagged calls from our database: block spam calls, block robocalls, spam likely, scam call blocker, and potential fraud calls. After call screen enables you to instantly block any unwanted callers or unknown numbers. Key Features: ★ Spam Call Blocker ★ After call menu for instant number blocking ★ Call Filter ★ Block unknown callers ★ Telemarketing, spam and robocall blocker ★ Call Filter from blacklist on your device. ★ Block calls from our extensive spam database. ★ Caller ID With CallMaster you can block spam calls, phone numbers and contacts from your phone book or dialer. CallMaster uses accessibility capabilities to control volume keys on your device. The app does not collect and does not send any kind of information. We also use "draw over other apps" permission to display Spam Warning in real-time Thank you for using Caller ID, Call Blocker - CallMaster