Note that the Fine Tuning and the Historical Curve modes can be activated only throughout in-app purchases. Thanks to its intuitive design, finding your way around the insTuner interface is fairly easy: the main panel displays the currently captured note, and you get to expand the window in order to access the tone generator. Moreover, insTuner can also generate tones in order to help you tune your instruments by ear: this way you can both check and improve your tone recognizing capabilities. The app comes with an advanced Digital Signal Processing algorithm which means that it can automatically analyze the sound captured by your Mac’s microphone and display details about the tone used. InsTuner works as a status bar menu application, which means that its easily accessible without requiring your attention unnecessarily. User friendly instrument tuning utility that does not interfere with your workflow insTuner is a small but very efficient Mac OS X application that can help you perform this task with minimal effort. Tuning your acoustic or electric musical instruments can prove to be rather challenging without the appropriate tools.