Tuner - gStrings Free apk content rating is Everyone and can be downloaded and installed on android devices supporting 16 api and above.
gStrings is a chromatic tuner application measuring sound pitch and intensity.
It will let you tune any musical instrument (violin, viola, violoncello, bass, guitar, piano, wind instruments, your own voice/singing).
Features include: 1. multiple built-in instruments and tunings, 2. support for user-defined custom tunings, 3. a long list of built-in temperaments (just, pythagorean, meantone, comma, etc.), 4. support for user-defined custom temperaments, 5. orchestra tuning (shifting/redefining tone frequencies), 6. pitch pipe, and many more.
If you were looking for a guitar tuner, try it!
(*) the INTERNET permission is used for ads only.
(**) most of the historic temperaments were included courtesy of NetCat AG.