Why buy a separate tuner to take around with you when you are already carrying around your Windows 8 device. In fact it can probably do the job better than most cheap tuners on the market.
Tune Up helps you tune any instrument. it works by finding the note nearest to what is heard, and then shows how flat or sharp it is using a needle on the screen.
Tune Up is a chromatic tuner, which means that you can tune to any note, not just particular ones. This is a great help for getting high notes in tune on wind instruments.
If you are using a transposing instrument, you can also select its key, for example a Trumpet, Clarinet, or Saxophone. For guitar, piano, flute, etc., choose the key of C.
When selecting the key of C, the program also allows you to play tuning notes for the most common method of tuning a 6 string guitar.