GuitarTuner is a program running on Symbian S60 3rd generation SMART phones like NOKIA N95 (complete list see at the bottom of the page).
Like a standalone Instrument Tuner it is able to analyze a tone of a guitar (or nearly every other instrument) and show the note and the mistuning using a pointer and bar display. In addition (which not standard for other tuners) this software shows the input level.
