The 1.0 version of CallWall for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The most popular version of CallWall for Mac is 1.0.
The software lies within Productivity Tools, more precisely Mind-mapping. The bundle id for this application is com.nullriver.CallWall. The CallWall installer is commonly called CallWall.zip. This Mac app is an intellectual property of Nullriver, Inc.
From the developer:
Telemarketers use large phone number databases to target random people like you, often calling with random offers and potential scams. Most of the time, they have no idea what they are selling you, but they sure want to sell it.
With CallWall, you can block any of these calls on the first ring and not have to worry about telling the telemarketer that you don't have time or interest in their repetitive offers.
You may want to check out more Mac applications, such as Vitamin-R 1008, Java Contactor or MindNode Pro-2, which might be related to CallWall.