Even with Apple's strict guidelines, a few unbelievable and mind boggling apps have made their way into the App Store. Here is a quick look at some of the most horrible, offensive and useless apps ever created for the iPhone and iPad.

#10. Pocket Heat

Release Date: January, 2010
Banned: Still available
Download link ($0.99)

Pocket Heat used to drain your battery and overheat your iPhone to keep your hands warm, but now it's just a "faux heater" that does its "best to heat you up using nothing more than pixels and sound waves". It looks like Apple wasn't happy about people turning their iPhones into portable heaters based on the App's official App Store message to haters:

"To all the negative comments - the app used to create heat by using the GPS, accelerometer and other things. This is no longer the case as Apple would not allow that functionality in this instance. We apologize for the confusion, but our descriptions and updates have always told what the app does."

Ironhide Game Studios has released the official Kingdom Rush Frontiers trailer. Frontiers is the sequel to the highly popular tower defense game Kingdom Rush. The gameplay for Frontiers looks unchanged, but the trailer reveals all new terrains, towers and enemies like giant scorpions and evil genies. The game also features three new heroes that were previously showcased in their own individual videos.

Kingdom Rush and Kingdom Rush Frontiers are tower defense games set in the Medieval times. In the original game, players must use a combination of towers, and magic spells to defeat armies of goblins, trolls and other mythical creatures. Kingdom Rush is considered one of the best tower defense games ever released. The original is available for the iPod touch, iPhone and iPad for $0.99. There is also an HD version available for the iPad.

Reading notifications directly on the iOS home screen just got easier thanks to the jailbreak tweak Badger. Outstanding badges on app icons might lead you to open notification center, or open the app to see what's up. Badger circumvents all of these roundabout methods, making it possible to read and delete app alerts immediately on the home screen.

Once installed, Badger can be customized from Settings -> Badger. Default settings mean that swiping up on an app icon with a badge will reveal the latest notifications, much like opening an iOS folder. From there, you can swipe to delete or tap the alert text to read the full notification.

Zagg is holding a site-wide Memorial Day sale for all Apple products. iPad and iPad mini keyboards are 20% off, and all iPhone, iPad and iPad mini cases and accessories, including audio products and portable battery chargers, are 50% off. The sale runs from Monday, May 27th to Tuesday, May 28th.

The Zagg invisibleSHIELD screen protector is available for the iPhone 4/4S/5, iPad 3/4, and iPad mini. The invisibleSHIELD is a great way to protect your Apple device from smudges, scratches and even breaks and falls, without adding any unnecessary bulk to your device. The popular Zagg film comes in several different types, including the original basic scratch-resistant model, to the high-definition "glass-like" version for Retina display devices. All versions of the invisibleSHIELD come with a free lifetime replacement warranty.

There doesn't seem to be a need for multicolored iPhones since most people prefer to use a case, but that hasn't stopped the rumor mill from insisting they're a possibility. The Japanese blog Macotakara claims both the rumored iPhone 5S, and low-cost iPhone, will be available in an array of rainbow-like colors this fall.

According to the translated report, the low-cost iPhone will ship in white, pink, green, blue, and yellow-orange, and the so-called iPhone 5S will be available in the standard black and white, plus green and gold. A previously leaked image of two rumored iPhone 5S nanoSIM trays also suggests that the new handset will be available in gray.