I was a fan of Guitar Toolkit, before it was abandoned by the developer and stopped functioning. That app cost $10, which I still consider a worthy investment considering the length of time I used the app. I downloaded GuitarTuna, and deleted it immediately when I opened it for the first time as saw it had a monthly subscription signup required to use it at all. Not cool. I would have paid a one-time fee, but a subscription doesn’t make sense for a tool that should operate standalone on my phone. This app works, and it appears to actually be free. Don’t listen to the reviewers who claim they broke a string trying to tune with this app. Definitely a user malfunction, if not trolling. As far as the aesthetics of the app, I would prefer an analog-style needle to the horizontal line guide, but it doesn’t change the function. The green box indicating “in-tune” is a bit loose, but the center line is on pitch. I recommend this app because it works as advertised within the limits of the iPhone microphone, and it’s actually free with no subscription paywall bullish¡t.

A great tuning app! I'm personally a beginner in electric guitar, so I have to rely solely on tabs, since I do not yet know my notes. This app contains a multitude of different tunings, which I think will be very helpful to those who want to play songs not exactly in standard tuning! I instantly think of Nirvana songs, which having tunings that range from a full step down to just a half step. This app makes it super easy to tune to these, even when you have little knowledge. For people on acoustic (or electric, it applies to both), this app is able to teach many common chords, which i think is super cool! The only issue I have with this app is that it cannot detect low strings. At all. Whenever i'm tuning my low E (standard tuning), no matter how how low i turn the dial on my guitar, it says that it's too high, sometimes glitching out before it does so. Even when I'm tuning for different tunings—for this case i'll use a full step down—it cannot detect the low(er) strings like D and G. This causes me to have to rely solely on my ears to tune my strings. Not too annoying, but it'd be way more helpful if this was fixed. Overall, this app is great! been using it since December and haven't faced any major issues!

I got the app last year and I have been using it ever since. I honestly don’t have any problems with the app. The app listens to it so nicely, and I even got my guitar teacher to check if it was tuned and IT WAS!!! I love it so much, if you are deciding to download the app do so. Tbh I had my doubts and thought that it wasn’t listening or just didn’t tune it right, but I was shocked that the app was made so nicely. Thank you Simply Tuner for making Tuning much easier. 🙏 I have no need to try to learn the cords because I have classes but if you do there are tons of other Reviews to read from. Hopefully you find what you are looking for..