Roadie Tuner automatic guitar tuner, tunes your guitar in seconds. Just simply connect the Roadie Tuner to the tuning peg, strum the string, and Roadie will tune it for you. You can download the Roadie app for iOS and Android devices, which allows you to choose from multiple alternate tunings or create your own custom tuning. It can tunes 6-7-12 string guitars, ukulele, banjo with standard guitar pegs.