Signal is compatible with RedPhone, its Android sibling, and scrambles voice calls placed via the iPhone.
In this week's Mac app roundup, you'll find a duck that likes to move your data around, a phone that doesn't need dusting, and a tower that knows what happened to all your files.
Microsoft's Skype team said the new iPhone app version, due in a week, will finally be on a par with its Android and iOS counterparts. In particular, the pesky offline messaging bugs will be solved, the team promises.
Talking to a bunch of your buds just got a whole lot less costly for Skype users.
While Google has its own stagnant Google Voice client for iOS, GV Mobile + is a far superior offering, and it's Macworld senior editor Dan Moren's Staff Pick this week.