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If you thought apps were just for tech geeks, then think again. Apps are hipper than ever these days.

Once upon a time, you had to flip through tons of magazines to find what you were looking for. Now, thanks to Web 2.0, the worlds of fashion and luxury are just a tap away. Find out where the celebrities are shopping, get real-time advice, go backstage at the fashion shows and share all your thoughts with your friends.

Here are some of the most interesting apps right now, and they’re all free, to boot.

Trendabl (iOS and Android) is really simple to use and lets you take photos of your own looks, modify them and share them on the major social networks. It also lets you add the brand name, price, color and store where you bought the pictured piece. Pose (iOS and Android) is an alternative in the same vein.

Polyvore is one of the best sites out there, according to Time and the Huffington Post. Get style tips and discover the latest trends.

With Style.com (iOS and Nook) and The Cut on the Runway (iPad only) you can check out the latest looks from the runways in New York, London, Milan and Paris, as well as videos of fashion shows, photos and all the fashion world news.

Last but not least, true fashion hounds always keep a copy of Vogue in their bags. The Vogue Stylist app has all the latest trends and fashion choices approved by the prestigious magazine’s editors.