Das Telefonbuch with Caller ID and spam protection is an Android app for people who get phone calls or messages from unknown numbers.

It informs you in a very clear way about phone calls and text messages from unknown numbers and helps you decide whether to pick up the call or send the message.

The app will search for a number in the phone directory and show you the name of the caller. If the number is not in the directory, it will search for the number in the database of Das Telefonbuch.