I don't think any app can compare favorably to a clipon tuner, if for no reason other than clip on tuners work in noisy rooms. Tuner apps are useful if you have

I don't think any app can compare favorably to a clipon tuner, if for no reason other than clip on tuners work in noisy rooms. Tuner apps are useful if you have no other options, but compared to a clip on or tuning pedal, no question what's better. You ever see a musician on stage using their phone to tune?