Zen Tuner is a minimal chromatic tuner designed for iPhone. Developed by Jean-Pierre Simard, this free app is perfect for musicians of all levels who want to keep their instruments in tune. Whether you play woodwinds, brass, strings, or even sing, Zen Tuner has got you covered.

The app boasts a beautiful, clean, and simple interface that is easy to navigate. The current note is displayed prominently, with a high marker that changes from red to green when the note is perfectly in tune. This visual feedback makes it easy to quickly tune your instrument.

One of the standout features of Zen Tuner is its one-touch menu that allows you to apply a transposition. This feature is particularly useful for musicians who play multiple instruments and need to quickly switch between tunings.

Additionally, Zen Tuner allows you to customize your tuning preference. Simply tap the main note to adjust whether you prefer sharps or flats. This level of customization ensures that you can tune your instrument to your exact specifications.

No matter the size or orientation of your iPhone, Zen Tuner works seamlessly on all screen sizes. It is optimized for both the smallest iPhone and the largest iPad, providing a consistent and reliable tuning experience.

Overall, Zen Tuner is a simple and effective chromatic tuner for iPhone. With its user-friendly interface and useful features, it is a must-have app for any musician looking to keep their instruments in tune.