All In Tune - Guitar Tuner is a guitar tuner app that can detect all the notes that you can play on an acoustic, electric or bass guitar. This is a free app and contains no ads or in-app purchases. You can use this to tune your guitar and other stringed instruments.

It is very important that you use it in a quiet environment because it can be very noisy. If it is too noisy, it can give false results and won't detect the correct note. It is recommended to use it in a silent environment.

It is an important note that this app can only detect the notes that you play on your guitar and other stringed instruments. It does not detect the notes that you play on keyboards or other instruments.