How well can you visualize the 3D structure of the DNA molecule? Can you spot erroneous depictions of DNA as a left-handed double helix? If you're not satisfied with your level of understanding of DNA structure or would like to have at your fingertips an instant memory refresher for which nucleotides pair with each other in the double helix of DNA etc., then OnScreen DNA Model™ for Macintosh could be worth many times its small price to you.
I feel the negative review based on disappointment that the app didn't do something that was nowhere promised in the app's description is unfair, so please read the description below. OnScreen DNA Model for Mac, which is an enhancement over the iPad app of the same name and a modification of OnScreen DNA Lite for Mac, provides you with a beautiful DNA model in 3D perspective to play with and to learn the basics of DNA structure from.