Ivan Karpan & Evgeniy Lebed has GlobeConvert (iTunes Link) for the iPhone and iPod Touch and GlobeConvert Pro (iTunes Link) for the iPad in the iTunes App Store for FREE (regularly 99-cents) for a limited time.

GlobeConvert easily converts to the co-ordinates you are used to any values of 80+ units of following types: Temperature, Pressure, Weight, Volume, Length, Time, Energy, Power, Speed, Area.

Currency converter contains 190+ commonly and rarely used currencies and updates exchange rates online and on-the-fly. You can also save your favorite presets you use the most and access them quickly and easily when you need it. Complete information about the units and currencies GlobeConvert contains can be found on its web-site.

Francis Bonnin has Video 2 Photo – extract still pictures from movies (iTunes Link) for the iPhone and iPod Touch in the iTunes App Store for FREE (regularly $1.99) for a limited time.

Video 2 Photo allows you to export one or more photos from your videos in a quick, fun and original way.

Videos can be imported from the camera roll of your iDevice. Events and Albums are recognized. You can also connect your iDevice to iTunes in order to drag and drop other videos (iTunes file sharing feature). The camera can be used directly to record a video in order to extract the images quickly thereafter.

An animated and original interface allows you to select a picture from all the ones contained in the video. It is also possible to view the video (possibly in full screen) and to directly target a specific time.

Serge Ramelli has Lightroom 4 Retouching (iTunes Link) for the iPhone, iPod Touch, and iPad in the iTunes App Store for FREE (regularly $5.99) for a limited time.

Serge Ramelli a french photographer who specialized in urban/landscapes photography over the last 6 years and is known for his very simple way of teaching. 
You will find various unique tips and tricks to get the most out of your photos. NO technical jargon used without a simple explanation. More importantly get straight to work doing stunning landscapes.

 Included with the app is access to amazing high-res pictures (raw files), so you can follow along the retouch process and get the same results.

sigterm has Data Usage (iTunes Link) for the iPhone, iPod Touch, and iPad in the iTunes App Store for FREE (regularly 99-cents) for a limited time.

sigterm also has Data Usage Pro (iTunes Link) for the iPhone, iPod Touch, and iPad in the iTunes App Store for $1.99 (3.99 – 50% oqff) for a limited time.

Data Usage monitors cellular (3G/4G/LTE/Edge/GPRS) and Wi-Fi data usage real time from your device.

Set data quota and billing cycle information and let Data Usage worry about making sure you don’t pay for overages again.

App runs in background periodically, shows used, remaining or predicted % as application badge and sends you alert when you exceed specified usage level.

With this most precise tool, you are always in control of data plan limit and save hundreds or thousands on data overages.

The Pro version offers unlimited custom counters and the ability to create one for tracking roaming usage or pre-paid usage or billing cycles that are not monthly or weekly or to track cellular downloads. You can also set data quota and billing cycle information and let Data Usage worry about making sure you don’t pay for overages again.

Gameloft has Modern Combat 4: Zero Hour (iTunes Link) for the iPhone, iPod Touch, and iPad in the iTunes App Store for 99-cents (6.99 – 6 instant savings) for a limited time.

The #1 first person shooter is back on smartphone with a new chapter to push the boundaries of mobile gaming even further. In the wake of a nuclear disaster, the only chance to avoid global devastation is in the hands of the few elite soldiers who must track down and rescue the world’s leaders from a frighteningly familiar terrorist group.