Free Universal Tuner, by Dmitry Pogrebnyak. https://play.google.com/store/apps/details?id=ru.aterlux.guitartuner https://play.google.com/store/apps/details?id=

Free Universal Tuner, by Dmitry Pogrebnyak. https://play.google.com/store/apps/details?id=ru.aterlux.guitartuner https://play.google.com/store/apps/details?id=ru.aterlux.gui... I appreciate that you can choose the microphone source, change detection parameters, and easily select off-440 tunings. It's responsive and accurate enough for my playing. The only issue I ever had was on the Fairphone 3. Starting a few months ago, if I had Google Assistant always listening, the tuner would stop working. I've since disabled Assistant and changed phones.