To adjust the pitch of a string, turn the string’s corresponding tuning key on the head of the guitar. FEATURES : - Guitar, bass and Ukulele Tuner easy for Beginners and accurate for Pros - You can unlock tunings (Open, Drop, Modal, etc..) - Chord Library : fully visual chord library with more than 1500 chords - Instrumental Jam Tracks to play along, Blues, Rock, Reggae, Jazz, Hard Rock, .... Follow the instructions on the App to up or down the tension of strings. Coach Tuner : *** Developed by Manomaya SA *** Developer of the first visual method to learn guitar hits with colors CoachGuitar : https//coachguitar.com - Demo of Coach Guitar Lessons here: https://www.youtube.com/watch?v=O3UA3E4YGXA - facebook.com/coachguitar - twitter.com/coachguitar CoachGuitar App reached Top #1 music app in 11 countries COACHTUNER PREMIUM ACCESS SUBSCRIPTION You can subscribe for premium access with the Premium subscription. Once a premium member you get 80 open tunings, the best chords library and best guitar, bass and ukulele tuning service. - The subscriptions are $7.99 weekly, or $49.99 yearly - Payment will be charged to iTunes Account at confirmation of purchase - Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period - Account will be charged for renewal within 24-hours prior to the end of the current period at the cost of the chosen package - Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's iTunes Store Settings after purchase - No cancellation of the current subscription is allowed during active subscription period - Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable - CoachTuner Premium Pass is an option and the app can be used for free without it Terms : https://coachguitar.com/tuner/terms/