After an unscheduled trip to the tile floor, I found myself in need of new electronic tuner. Went to the Google Play Store and got the free "PitchLab" tuner app. Works perfectly, and has several cool functions. Has to be used in a fairly quiet place, but is very accurate. Plus, it's sure easier to see on a phone screen. I'd give it two thumbs up, except it scrolls pesky ads at the bottom of the screen. For a freebie, I can live with ads.