ChordMaster is a great little reference guitar iPhone app. What it does is quite simple: you tell it what chord you want, and it shows you where to press on the fretboard, including advice about what finger to use, all up and down the guitar neck.
What really elevates this app compared to a variety of similar apps out there is the interface. The application cleverly uses a combination of easy-to-manipulate scroll wheels for root note and extensions, while a series of buttons select major, minor, augmented, or diminished. Another pair of buttons move up and down the neck of the guitar.
ChordMaster is made by Planet Waves, a company which is known for a lot of entry- and mid-level guitar gear. (They’re the same company that makes D’addario strings, which just about everyone has used at one time or another). And at only 99 cents, it is an easy, cheap purchase.
The only argument against getting this app might be if you already have Guitar Toolkit, which is a $10 app that also includes a chord chart. Unlike with most other guitar apps I’ve seen, I feel like it’s possible to argue that Chord Master’s implementation is actually more intuitive and thorough than Guitar Toolkit’s, although, of course, Guitar Toolkit has many more useful features. Which interface is better for studying chords will be a matter of personal taste.
Every guitarist, sooner or later, runs into a situation where they need to play a chord they don’t know. Obviously, there’s no substitute, in the long run, for understanding chord construction and being able to figure it out on your own. In the short run, however, an application like ChordMaster can be invaluable, saving you time and effort, or preventing you from having to “fake it” by skipping a couple of the extensions in a complex chord. At .99, this guitar app is easy to recommend.