"I hold in my hand one of the world’s best online tuners. It’s fast, accurate, and easy to use," the old man said as he slowly lifted his iPhone 6s to the sky…
Okay, so maybe the iPhone is not one of the world’s best online tuners, but it’s a pretty good one. The same tiny little speaker you use to call your bestie and tell them that you’re at the mall can be used to tune those guitar strings up when you’re ready to rock some faces off!
All of the tuners mentioned below work a lot better with an acoustic guitar or amplified electric guitar, especially when there’s minimal background noise.
However, you can plug your electric (or acoustic/electric) guitar directly into your phone with an inexpensive adapter like this one from Peterson: