Walk through any makeup aisle and you'll see that the fun of beauty products is that they're a relatively low-cost and temporary way to experiment with the latest trends. Well, add the convenience of smartphone apps to the playing field and you can color us on-the-go makeup artists! There is an almost overwhelming amount of apps available to help you do a creative and "pinable" manicure or test out a new hair color minus the actual commitment. Here, we selected our top (free!) apps to give you access to the best of beauty trends and tools right at your fingertips.