Gstring——The most professional chromatic tuner & guitar learning app. Excepting for the traditional teaching, this guitar lessons bring the guitar beginners the best experience on how to learn guitar well on base training, playing skill, tabs exercises and guitar chords library, is an effective shortcuts for guitar beginners to become masters.

Gstring Core Functions_
【Guitar Tuner】
#Instruments#: Suitable for several instruments like guitar, piano, ukulele,bass, violin and so on
1.Guitar Tuning Modes: General Tuning、Lower Tuning、Higher Tuning、Dropped Tuning......
2.Piano Tuning Modes: all transposition
3.Ukulele Tuning Modes: C Tuning、C Tuning (Linear/Low G/Tenor C)......
4.Bass Tuning Modes: Standard、Whole Step Down、Drop D、Drop C、Drop D/G......
5.Violin Tuning Modes: 4.Standard Tuning(Violin)、Tenor Violin(Violin)、Cajun tuning(Violin)......
#High Accuracy#: Professional chromatic tuner that can accurate to 0.01 cents
#Tuning modes#: Auto mode & manual mode
#Left-handed mode#: Meet different requirements of guitar players
#Other parameter#: Pitch(A4), frequency(Hz), temperament, notation, etc.

【Guitar Tabs】
#Professional tools#: Metronome, speed and melody
1.Metronome: To master the sense of rhythm and speed
2.Speed: Adjust the difficulty of guitar tabs and so does the learning’s
3. Melody: To grasp the position of each scale as well as the tempo
#Hit songs#: All from the most popular song list, including every songs you want to learn
#Smart tabs-reading#: Appropriate tabs-reading interface that especially designed for iPhone and iPad, suitable for every guitar players to read
#Classification#: Elementary, advanced and hard levels that specially customize for all players

【Guitar Lessons】
#Course system#: To lead you from a guitar beginners to a master
#Learning modes#: Tabs mode & game mode, always follow you as a “guitar teacher”
#Playing skills#: Quick-learn tutorials on guitar playing skill
#Pro tools#: Met. & speed
#Accuracy analysis#: To make a great progress via the accurate system calculation

【Guitar Chords】
#Comprehensive chords#: over 5000 chords can be searched in one click
#Transposition#: One-click transposition, the fastest chords calculation
#Strumming pattern#: Unlimited patterns that easy to learn and play
#Chords memory#: To grasp chords through funny chord games

【Base Training】
#Scale memory#: To grasp scale positions and improve fingers’ flexibility
#Finger independence exercises#: To improve the fingers’ independence, coordination and strength
#Classification#: Easy, advanced and hard levels that help you to do well in guitar playing.
#Professional tools#: Met. & speed
#Learning modes#: Tabs & game modes

【More about INS.BRIDGE】
For more information or materials, welcome to follow and contact us!
Official Website:
Facebook: Ins Bridge
YouTube: Ins. Bridge

The following subscription options are included:
-Every new user will be entitled to a 3-day trial period.
-Any unused portion of trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable.
-Please kindly note that All recurring subscriptions will auto-renew unless auto-renewal is turned off at least 24 hours before the end of the current period.
-Payments will be charged to your iTunes account at confirmation of purchase.
-Three subscription options: weekly subscription: $3.99/week; monthly subscription: $8.99/month; yearly subscription: $39.99/year.
-Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase.
*Prices are equal to the value that "Apple's App Store Matrix" determines is the equivalent of the subscription price in USD($).

Privacy Policy:
Terms of Service:

What’s New

Version 4.3.1

*fix bugs (iphone6 screen fix)
*fix guitar lessons bugs
*fix metronome mete = 1/4 bugs
fix other bug

Ratings and Reviews

4.6 out of 5
644 Ratings

644 Ratings

True_ALG ,

Great Purchase

Finally a tuning app that offers different tuning modes at a fixed price! All of these other tuning apps don’t give you access unless you pay a monthly or weekly subscription. Highly recommend as you can get access to all guitar tunings for 2.99.

Missy2128 ,


So it is pretty useful but if I tie it looser then it tells me to tie it tighter then when I get it onto the right note I can barely see if I’m supposed to tighten it if I’m supposed to make it lower. It is pretty hard to see if you’re supposed to tighten it or loosen it. I would say that it would be better if you did not use this app sometimes I have to even try to get my face closer to my screen to see what it says because it goes so fast. Do NOT USE THIS APP!!!!!!!!

mr henky the christmas poo ,

Simple, easy to use, convenient

Just started using the app. As an intermediate guitar player, it’s perfect for what I need. I can tune my guitar in a matter of minutes. No glitches or ads. Thanks for keeping it simple


Haochang Huang
241.6 MB

Requires iOS 11.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, French, German, Italian, Japanese, Portuguese, Simplified Chinese, Spanish, Traditional Chinese

Age Rating
In-App Purchases
  1. Full Version $9.99
  2. Guitar tuner Pro $2.99
  3. bass tuner Pro $2.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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