Call Blocker is a free Android utility and tool app developed by Nguyễn Đắc Phúc. It is designed to block annoying calls from unwanted people, telemarketers, and robot callers. With Call Blocker, you can easily avoid disturbance from unwanted people when you don't want to talk.

The app has a simple and user-friendly interface that allows you to blacklist any number with ease. You can also whitelist important contacts to ensure you don't miss any important calls. Call Blocker also allows you to configure the blocking settings as per your preferences. You can block all calls, unknown numbers, private numbers, and more.

One of the main features of Call Blocker is the blocked call history, which lets you see all the calls that have been blocked. This feature helps you to keep track of all the unwanted calls that have been blocked by the app.

If you want to remove ads, you can buy the PRO version of the app, which is available on the Google Play Store.

Overall, Call Blocker is an effective solution to block unwanted calls. With its easy-to-use interface and useful features, it is definitely worth trying out.