I bought the actual book many years ago, and Ive had this app from the beginning. The app is easier to use than the book, and the selection is the same, or better.
But a major problem is with the quality of the photos. Sometimes the photo is too close up to get a really good idea of the overall grain pattern. But worse, is that the colors are not corrected. On iPads, with their calibrated screens, this is disappointing. Too often, the color is nothing like the actual color of the wood. This color can significantly vary even among the same wood species when different examples are given.
If they could correct the colors, that would go a long way towards making this app extremely useful in wood selection. Include two photos, one of a close-up, and one of a larger portion, and it would be about perfect.
melgross about I.D. Wood, v3.40