Well, it was fun while it lasted.
The 99-cent app scanned your Facebook friend list each time you ran the program and compared it with the last list. If it noticed a missing name, it alerted you to the wayward friend.
(Coincidentally, "unfriend" was the New Oxford American Dictionary's 2009 Word of the Year.)
But only days after Defriended's debut, Facebook blocked the application, and Apple pulled it from the App store.
The app is no longer available in the App store, and Facebook confirmed to social media blog Mashable Wednesday that that the app was blocked for violating the developer agreement.
"While we cannot remove an application running on another website or platform, we will ensure that applications that access Facebook user data adhere to Facebook Platform policies," the company said.
Looks like those who want to keep track of the friends bringing down their virtual popularity will have to find other options.
This iPhone application isn't the only one to have stirred debate. Here are a few other iPhone applications that have been pulled from Apple's App Store for a variety of reasons.
In April, the 99 cent Baby Shaker, was pulled from the App Store after it prompted outrage from organizations such as the National Center on Shaken Baby Syndrome and the Sarah Jane Brain Foundation.
The description of the app said, "See how long you can endure his or her adorable cries before you just have to find a way to quiet the baby down!"
The program displays a black and white picture of a baby with the sound of crying. Users shake the iPhone to stop the crying until Xs appear on the eyes of the baby. The company behind the app, Sikalosoft, did not immediately respond to requests for comment.
Apple offered an apology soon after it appeared, the same day the App Store reached 1 billion downloads.
Apple spokeswoman Natalie Kerris said the game was "deeply offensive" and should not have been approved for sale, according to The Associated Press.
"We sincerely apologize for this mistake," Kerris said in a statement.
Before Apple yanked this $999.99 iPhone and iPod Touch application from the App Store in August, eight people had purchased the functionless application.
Designed by German developer Armin Heinrich, the program did nothing but broadcast to the world the wealth of the owner. Once downloaded and activated, "I Am Rich" displayed a glowing, red "ruby" on the user's iPhone screen.
In its official App Store description, the developer wrote: "The red icon on your iPhone or iPod Touch always reminds you (and others when you show it to them) that you were able to afford this. ... It's a work of art with no hidden function at all."
According to tech blog Valleywag, one curious patron accidentally downloaded the application, thinking it was a joke. But it seems that seven others -- five in the United States, one in Germany and one in France -- meant to actually buy the pricey program.
When another developer tried to spoof the "I Am Rich" app with a "poor man's version," Apple denied that one, too.
Submitted to Apple later in August, "I Am Poor" was intended to be the ultimate un-status symbol.