When an earlier incarnation of You Don't Know Jack hit the App Store last year, it captured the look and spirit of the long-running trivia favorite -- including the risqué subject matter and abrasively hilarious narration -- but its single-player-only approach eschewed the multiplayer mentality that made the series such a beloved institution. Luckily, Jellyvision went back to the drawing board and came back with an inventive asynchronous take on the formula, which near-perfectly recreates the fantastic feel and flow of the bigger versions in mobile-friendly, bite-sized chunks.

KitCam is the most thorough and well thought-out camera app I've used to date. For under two bucks, KitCam offers 60 different lenses, films, and frames to enhance iPhone images (even more are available as in-app purchases), and with the latest version 1.1, photos from your existing library can also be edited or enhanced with the app's bag of tricks. Most are also available for up to 1080p HD movies shot with KitCam’s slick video camera mode.

It's easy to lose perspective on a game like Modern Combat 4: Zero Hour, particularly for those of us who enjoy lavish first-person shooters on consoles or computers. Gameloft's military shooter series seems content to mimic the immensely popular Call of Duty series from other platforms -- and Zero Hour boasts some serious parallels with this year's Black Ops II -- but despite its lack of ambition, the franchise delivers a big and entertaining mobile shooter at a fraction of the cost. And Zero Hour really does improve on the formula in small, but meaningful ways.

Calendar never really grabbed me on the iPhone, and for whatever reason, neither have the non-Apple scheduling and day-planning options that I've tried. But when I heard Flexibits' Fantastical was making the jump to iPhone and iPod touch, even I was intrigued. I had read so much about its much-loved Mac app that I couldn't resist the urge to try a cheaper, mobile version of the popular utility. And it's very easy to see why Fantastical is so revered.