Tuner - DaTuner Pro (Android) app for $1.48
The Tuner - DaTuner Pro Chromatic Tuner app is an all-purpose chromatic tuner for your Android device. Tuner - DaTuner Pro Chromatic Tuner has automatic sensitivity for tuning your guitar, ukelele, violin, bass, cello, mandolin, piano, harp, saxophone, balafon, harmonica, and kazoo. The nearest note and octave is displayed in a large font in the center of the screen and frequency in hertz and error in cents at the bottom. Adjust sensitivity manually through a bar on the left-hand side. Adjust speed and accuracy of the algorithm and the relative frequency through configuration menu. The display turns green when the incoming frequency is within a configurable range of the target frequency. You can see small changes in pitch within the range area. Configure the in-tune range and the colors shown for sharp and flat. The emulated strobe tuner display provides visual feedback to how close you are to your desired note.