App Tittle : Simple Guitar Tuner Pro Developer : Ullrich Vormbrock Download Link: Download through app store Description : A must-have for every musician: this chromatic tuner is very fast, accurate and recognizes all strings using the built-in mic! Easy and perfect fine-tuning for electric and acoustic guitar, bass, cello, ukulele, etc. This app is developed by a guitarist and electrical engineer, thus it combines high usability and cutting-edge signal processing. Simple Guitar Tuner Pro is easy to use and provides an aesthetic and customizable user interface. Features: + High precision (approximately 0.1 %). + Large frequency range (22 Hz to 1000 Hz). + Suitable for all kinds of string instruments. + Display of exact frequency (in Hz). + Display of frequency deviation (in Hz, marked by up/down arrow). + Gauge view of the detected tone (semitone) and octave. + Spectral view (FFT visualization of overtones). + Time-domain view (autocorrelation). + Tuning by ear two selectable waveforms. + Configurable user interface (8 different themes). + Detailed user manual. + Free user support. + Developed for the iPhone and iPad (iOS 8.0 and above).