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, Suites & Dresses, Typography, and Viscosity.
What is great about each category is you can favorite whatever ones you want so you can quickly just view a list of your most frequently converted items. More so, inside each category, you can favorite your most-converted units of measurements. For example, if you only use the Teaspoon US and Ounce UK units, you can favorite them so you don't need to scroll through the entire list of units each time.
Other nice features let you view your conversion history, support for automatic currency updates from 164 currencies from 249 countries and regions, unit conversion precision up to 7 decimals, multiple color themes, and sets of unusual units, such as Kardashian, donkeypower, manpower, shot glass, fully loaded 747, Manhattan city block, and more. Additionally, Vert will soon be updated with new features, such as the ability to combine units like foot + inch, mile + foot, hour + minutes, pound + ounce, icon view for categories, a new category just for rock climbers, and an organized list of categories (Units of Measurement, Clothing and Other).
Vert is the best unite conversion app I've ever used and is available from the App Store for US$0.99.