Download of ByeByeBirdie 4.1 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The program relates to Communication Tools. The actual developer of this free Mac application is Javier Arce. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe.
From the developer:
ByeByeBirdie instantly tells you who stopped following you on Twitter.
You may want to check out more Mac applications, such as ituwitter, TwitterTool or ImageQuix, which might be similar to ByeByeBirdie.