Tuner+ is a free iPhone app developed by Nick Culbertson. It falls under the category of Multimedia, specifically Music & Radio. With Tuner+, you can easily tune your Guitar, Bass, Banjo, Mandolin, Cello, Violin, Piano, Viola, or Ukulele in seconds.

The app provides perfectly tuned notes for you to match your pitch to. It offers both real audio and sine wave form sounds. One notable feature of Tuner+ is its full VoiceOver Accessibility support, making it accessible to all users.

It's important to note that Tuner+ does not analyze the notes of your instrument to tell you if you are sharp or flat. Instead, it serves as a quick reference for ear tuning in any key.

Download Tuner+ now and enjoy the convenience of tuning your instruments with ease.