There's no shortage of unit conversion apps on the iPhone. Matter of fact, a unit conversion app was the first app I ever downloaded -- and that app has remained on my iPhone since. That is, until I found Vert. Vert is the most beautifully designed unit conversion app I've ever found. I'll let the screenshots speak for themselves, but as you can see, a lot of care went into the design. Best of all, its flat looks make it a perfect fit for the new iOS 7.
But design is one thing. What people want from a unit conversion app is a wide array of categories. Vert has 30 categories with over 700 different units. Not only do you have your normal weight, length, speed, time and volume units, you also get some units I've never seen before in a conversion app including Hats & Caps, Radioactivity, Shirt & Blouses, Shoes, Suits & Dresses, Typography and Viscosity.