Pitch Pipe+ is a versatile tuner application designed for iPhone users, ideal for both singers and musicians looking to tune their instruments accurately. It features three main views: Chromatic, Pitch Pipe, and Guitar. The Chromatic view allows playback of all pitches across six octaves, providing options for sustained notes or short bursts, making it especially useful for choirs and a-capella performances. The Pitch Pipe view replicates traditional pitch pipes with sampled sounds, offering a familiar experience for users accustomed to these devices.

The Guitar view caters specifically to guitar players, providing samples for various tunings including Standard, Dropped D, and Open tunings. An auto-advance feature simplifies tuning by automatically cycling through the strings. Additionally, users can calibrate the tuning frequency from A = 414 to 466 Hz, ensuring precise adjustments for different instruments. The app also supports Retina Displays, enhancing visual clarity.