MealSnap, a $2.99 iOS app lets you measure the calorie intake of the food you are about to ingest. All you need to do is take a pic of the food in front of you via the MealSnap app, send it in and the app would spit back the calorie count. The only draw-back of this app so far is that the order of magnitude of its estimates is pretty large.

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Orbitz makes its foray into the mobile app space by simultaneously launching free versions of iPhone and Android apps. The apps’ core features include booking flights, hotels and cars on the go. The user can also check their itenary, flight schedule, connect to travel support all from within the app. The travel apps space is a crowded marketplace, but Orbitz is differentiating itself by providing all the features (detailed below) as an integrated experience at one source.

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Twitter’s mobile strategy appears to be paying off ever since they launched official clients on the iPhone, Blackberry and Android platforms. According to Twitter CEO, Ev Williams, Twitter’s total mobile users has surged 62% in the last four months. What’s interesting is nearly 16% of new users begin their Twitter experience on a mobile device, either via official or third party apps, mobile web or sms.

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The latest version of Facebook’s iPhone app now plays video on the device. This upgrade was overdue and had to come as Facebook is now in the top 5 video sites behind YouTube in terms of the videos watched on a daily basis. Facebook has seen a surge in video uploads as much of the users directly upload clips from their video ready smart phones. Now users get to experience their or any friend’s video directly on their mobile device.

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PayPal has teamed up with Bump Technologies, and have launched a revamped iPhone app that lets you transfer money by just bumping two phones together. Here’s a situation – how quickly could you divvy up a food bill at a restaurant and sort out accounts instantly? The new app lets you calculate everyone’s share by splitting the check, even factoring in tax and tip. Then you just bump your phones together or choose a recipient from your mobile contacts and transfer money, instantly. All transactions between friends sorted, no sweat!

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