This app is designed to make navigating the I-Ching more natural. By clicking the hexagram lines to transform the hexagrams, you can gain a feel for each icon.
Shake your phone to select two random hexagrams. Click the text to cycle through different information about the hexagram. Click individual hexagram lines to change the hexagram. Pull the right screen edge of each hexagram to see the line text and commentary information. Pull the left screen edge of each hexagram to see any relational hexagrams, and click those to see the detailed information.