Experienced musicians can often tune by ear, but even with years of experience under your belt, you might not find it easy.
There are guitar tuners out there, but if you don’t want to spend money on one, or worry about losing it on the road, you can always use your smartphone.
We tested some of the most popular (using a physical tuner to compare results), to see which ones can keep your gigs going off without a hitch.
If you’re looking for a tool to help you learn guitar, we reviewed the innovative Fret Zealot system.
Guitar Tuna also looks good, displaying the different strings, the note you’re playing, and how far off tune it is.
Unfortunately, the free version is limited as far as the tunings it supports.