New iPhone applications are coming out every day and it's no surprise, what with the huge user-base of the iPhone and other Apple products.  This article will cover some of the iPhone applications that are definitely worth checking out this week.  Whether you want an app for gaming, productivity, utility, or you simply want to keep your iPhone up to speed with the latest and greatest of apps, this article will give you a good idea of where to start.

Gaming:  Assassin's Creed 2

Assassin's Creed 2 is one of the most anticipated games recently released for consoles and the PC.  Ubisoft just recently released an iPhone version of Assassin's Creed 2, called "Assassin's Creed II Discovery".  You can grab the app for a reasonable price from the Apple App Store, but it's important to know that the game is 147mb in size and it has rather awkward controls.  Still, it's worth a try, especially if you're a big fan of the franchise.

Lifestyle:  Siri

Siri is perhaps one of the most useful applications currently in the app store.  This handy app makes use of voice recognition, search engines, and online concierge services to deliver a streamlined app that not only works great, but is free too!  All you have to do is say a command, such as "Book a table for two at Outback Steakhouse" and Siri will take care of the rest, responding with a confirmation or lack of availability.  Now, take into consideration that Siri connects with popular online services such as TaxiMagic, CitySearch, StubHub, OpenTable, and MovieTickets, and you can just imagine how useful this little app can be.

Useful:  Where Is My Phone

One of the most common problems that people have with their mobile phone is that they misplace it.  If you are one of those people who tends to misplace your iPhone, then you may want to get Where Is My Phone?  This is an affordable application that plays back one of the pre-recorded sounds (or a recording of your own) when it recognizes your whistle.  The developers claim that their app can hear your whistle from over 10 meters away, making this a very useful app, even if it's just for playing pranks by setting off the "fart" sound under the seat of an unsuspecting friend.

GPS:  MotionX GPS Drive

A new and improved version of MotionX GPS Drive has been released and this app is definitely worth grabbing.  This app has been deemed by some sites as one of the best and most affordable GPS apps out there.  The app is very reasonably priced and you can make it even more useful by subscribing to the turn-by-turn voice service that is definitely within your budget. This app is definitely worth checking out for GPS navigation.