Google Search Now Offers A Cross-platform Guitar Tuner In The SERPs
https://www.androidpolice.comJust search for “Google tuner” in Google search, and you’ll get an easily understood chromatic tuner that works on both desktop and mobile. The device you’re using it on will need a microphone, of course, for it to work, and results may vary.
You need to search for “Google tuner”… if you search for “Tune my guitar” or similar, it doesn’t show up.