Tuner – gStrings+

Developer: cohortor.org
Price: €1.00
Tuner – gStings+ is far and away the best tuner on the market.  It works for piano, string instruments, and wind instruments.  gStrings+ allows you to play the target note (or its sharp), and then tune your instrument precisely down to a tenth of a Hertz using your phone’s microphone.  It can also tell you what note you are currently playing if you are unsure.  Additionally there are a wide variety of setting, enabling you to adjust the tuner to your exact needs.  You can specify your instrument for optimal precision, change the scale range, or even tune specifically for an orchestra.  Also, there are multiple skins allowing you to adjust the color if you are so inclined.  With gStrings+ in your pocket, you are always prepared to tune any instrument.