What's New!

April 27, 2024, v3.4.0 released.


TN-1G is a tuning meter for guitar.
You can tune your guitar, Standard, Half Step Down, Full Step Down, 1&1/2 Steps Down, Drop-D, Drop-D(half step down), Double Drop-D, Drop-G, Drop-C, Drop-C&G, Drop-C#, Drop-C(another set), Drop-B, Drop-A#, Drop-A, Open D, Open E, Open E7, Open Dm, Open Em, Open Em7, Open Dmaj7, Open Dadd9, Open G, Open A, Open A(another set), Open Gm, Open Am, Open Am7, Open G7, Open Gmaj7, G6, Dsus(DADGAD), Open C, C6, Open F, F6, DADEAD, DGDGAD, Taro Patch, G Wahine, Leonard's C, C Major(Atta's C), Keola's C, Mauna Loa, Old Mauna Loa, Dmaj7 Wahine, F Wahine, Double Slack F, Modal G(Gsus), Open C, Open C#, Open Cm, C Spanish, and Perfect 4th.

You can change reference pitch-A between 438Hz and 445Hz.

TN-1G has a tuning fork that emits a pitch corresponding to each string.
To make the sound, please tap the image of the tuning fork. By tapping again, you can stop.

    Release history

    April 27, 2024, v3.4.0

    Add a function for capotasto.
    Minor bug fixes.
    February 6, 2024, v3.3.6
    Minor bug fixes.
    October 7, 2023, v3.3.5
    Minor bug fixes.
    October 13, 2022, v3.3.3
    Minor bug fixes.
    September 29, 2022, v3.3.1
    Fix some screen layouts.
    April 6, 2022, v3.3.0
    Add Tablature.
    March 2, 2022, v3.2.10
    Fix some screen layouts.
    September 10, 2021, v3.2.9
    Minor bug fixes.
    May 18, 2021, v3.2.8
    Minor bug fixes.
    Remove my-image feature.
    May 6, 2021, v3.2.7
    It revised the privacy policy.
    It updates some libraries for iOS14.
    October 28, 2020, v3.2.6
    It made the ad on the tuning list smaller.
    October 9, 2020, v3.2.5
    It update some libraries for iOS14.
    January 10, 2020, v3.2.3
    Minor bug fixes.
    December 3, 2019, v3.2.2
    Some update for iOS13.
    September 16, 2019, v3.2.1
    Minor bug fixes.
    July 19, 2019, v3.2.0
    Improve performance on auto-mode.
    April 4, 2019, v3.1.5
    It updated some libraries.
    December 12, 2018, v3.1.4
    Fixed an issue when launching the app.
    November 21, 2018, v3.1.3
    Minor bug fixes.
    October 1, 2018, v3.1.2
    It updated some libraries.
    Minor bug fixes.
    September 24, 2018, v3.1.1
    Fix some screen layouts.
    August 24, 2018, v3.1.0
    You can permute tuning sets in the menu.
    July 13, 2018, v3.0.0
    Improved the performance.
    February 02, 2018, v2.9.1
    Fix ad banner due to the suspension of native ads.
    October 23, 2017, v2.9.0
    Some update for iOS11.
    Minor bug fixes.
    September 25, 2017, v2.8.2
    Minor bug fixes.
    Some libraries updated.
    August 29, 2017, v2.8.1
    Reduce app size.
    August 19, 2017, v2.8.0
    Added how-to videos to Settings.
    June 23, 2017, v2.7.0
    Added Welcome Tutorial to settings.
    May 24, 2017, v2.6.6
    Add a tuning set Drop-D(half step down).
    May 17, 2017, v2.6.5
    Minor bug fixes.
    May 4, 2017, v2.6.4
    It updated some images.
    April 20, 2017, v2.6.3
    The trial function was improved.
    March 11, 2017, v2.6.2
    It has no waiting time after movie of trial function.
    Some libraries were updated.
    January 5, 2017, v2.6.1
    Fix some image parts.
    December 21, 2016, v2.6.0
    The standard pitch and tuning set settings have been moved to the slide menu.
    September 24, 2016, v2.5.3
    Some update for iOS10.
    September 10, 2016, v2.5.2
    Fixed a bug of information window.
    August 20, 2016, v2.5.1
    Add cent-gauge.
    June 10, 2016, v2.5.0
    Add cent-gauge.
    May 19, 2016, v2.4.1
    Some libraries were updated.
    April 24, 2016, v2.4.0
    Fixed some image parts.
    March 15, 2016, v2.3.3
    Fixed a bug on screen transition.
    March 10, 2016, v2.3.2
    Some libraries were updated.
    February 16, 2016, v2.3.1
    Fixed some texts.
    Localized in Italian.
    Localized in German.
    January 8, 2016, v2.3.0
    You can try restricted features.
    Fixed some texts.
    Localized in Spanish.
    December 1, 2015, v2.2.1
    Fixed some texts.
    Localized in Indonesian.
    November 8, 2015, v2.2.0
    Added function that shares beat pattern data with TN-1B, TN-DR, Maelz DX Pro on your iPhone.
    October 10, 2015, v2.1.0
    Added drum-machine function.
    Removed strings function.
    September 26, 2015, v2.0.4
    Some fix for iOS9.
    August 14, 2015, v2.0.3
    Fixed the layout for iPad.
    June 27, 2015, v2.0.2
    Fixed some image parts.
    May 21, 2015, v2.0.1
    Added tuning-sets DADEAD and DGDGAD.
    April 24, 2015, v2.0.0
    Some image parts changed.
    Change the layout of Settings Screen.
    March 8, 2015, v1.9.9
    Fix screen layout.
    February 20, 2015, v1.9.8
    Added volume meter.
    January 16, 2015, v1.9.7
    Added tuning-sets Drop-C#, Drop-B, Drop-A# and Drop-A.
    December 3, 2014, v1.9.6
    Fixed a bug about a sound source.
    November 25, 2014, v1.9.5
    Added function "Remove Ads(In-App Purchase)".
    November 12, 2014, v1.9.4
    Change some image parts, and fixed some bug.
    October 1, 2014, v1.9.3
    Known bugs(BUG-TG-0002) is fixed.
    September 19, 2014, v1.9.2
    Change font size on Settings Screen.
    August 24, 2014, v1.9.1
    Modify some image parts.
    August 21, 2014, v1.9.0
    To be able to play the sound of each string.
    July 20, 2014, v1.8.0
    To be able to choose wallpaper from the photo album.
    April 26, 2014, v1.7.0
    Background of Main Screen can be changed.
    April 8, 2014, v1.6.4
    Added tuning sets, Modal G(Gsus), Open C, Open C#, Open Cm, C Spanish and Perfect 4th.
    February 17, 2014, v1.6.3
    Added tuning sets, Leonard's C, C Major(Atta's C), Keola's C, Mauna Loa, Old Mauna Loa, Dmaj7 Wahine, F Wahine and Double Slack F.
    Changed displaying target frequency in manual mode.
    Changed some images.
    February 3, 2014, v1.6.2
    Added tuning sets, Open C, C6, Open F, F6, Taro Patch and G Wahine.
    January 20, 2014, v1.5.2
    Added tuning sets, Drop-C, Drop-C&G, Drop-C(another set), Open E7, Open Em7, Open Dmaj7, Open Dadd9, Open A(another set), Open G7 and Open Gmaj7.
    January 2, 2014, v1.5.0
    Added auto mode function(one octave higher).
    Added a feature for manual mode that changes string-button by covering a device by hand.
    December 24, 2013, v1.3.2
    Fixed a bug of display view.
    December 20, 2013, v1.3.1
    Added auto mode function.
    Added tuning sets, 1&1/2 Steps Down, Drop-G, Open Dm, Open Em, Open Am and Open Am7.
    December 17, 2013, v1.2.2
    Some parts layout is changed.
    Added tuning sets, Full Step Down, Double Drop-D, Open E, Open A, Open Gm, G6.
    December 10, 2013, v1.2.1
    Known bugs(BUG-TG-0001) is fixed.
    Added tuning sets, Open D, Open G and DADGAD.
    December 5, 2013, v1.2.0
    Added function that changes the reference pitch.
    December 2, 2013, v1.1.0
    Add volume button for the tuning fork.
    December 1, 2013, v1.0.0

    December 3, 2019, v3.2.2
    Some update for iOS13.

    Known bugs

    BUG-TG-0001: Pitch detection of 6th-string is unstable.

    Bug fixed version 1.2.1 is released.

How to use TN-1G.


Q. Pitch meter is jerky, I can not tune my guitar well.

A. Please try to turn off auto mode, and twang harmonics(flageolet tones) on 12th-fret. May result in a smooth movement.

Q. The message "TN-1G needs Microphone." is displayed, the pitch meter does not work.

[no mic]

A. TN-1G uses the functionality of microphone to analyze the pitch. Microphone function needs your permission for privacy. Once you exit TN-1G, please enable TN-1G in [Settings icon]-[Privacy]-[Microphone].

[menu settings]
[menu privacy]
[menu microphone]
[menu tn1g]

Q. I cannot turn on switch `Proximity sensor works`.

A. This feature is disabled on devices(e.g. iPod touch) that do not have a proximity sensor.

Q. The screen is blackout when I use feature `Proximity sensor works`.

A. It is a design of proximity sensor. This is normal behavior. Please understand.

Q. I purchased "Remove Ads" earlier. After I re-install after I delete TN-1G, ads have become to be displayed again.

A. In purchase screen, please press "Restore" button. Of course, there is no charge.

Q. I already purchased "Remove Ads", but I have mistaken, pressed "Buy" button, not "Restore" button. Will I be charged again?

A. No charges will be applied. "Remove ads" is because it is in-app billing of non-consumable, it's the system that is not possible the same user to multiple purchases.

Q. When the app is closed, stop playback of drum machines.

A. This app does not support background playback. TN-DR or Maelz DX Pro have supported background playback. The rhythm pattern data can be shared with those apps. Please refer to `How to share with other apps`.

Privacy Policy

This Privacy Policy covers your use of this application.
This app does not collect, store, or share any personal information, or anything related to your device. We do not collect any statistics, trends, neither do we track user movements.
The app allows you to open web URLs from the application. The URLs might be saved by Internet browsers on your device.
For information regarding the information stored by the application, please read the privacy policy of the internet browsers on your device.
Also, this app displays advertisement by AdMob, Amazon Mobile Ads, and MoPub. The advertising module may use your data. In this Privacy Policy, please refer to Privacy Policy by Google, Amazon Privacy Notice by Amazon, and MoPub Privacy Policy by MoPub

to You.

Thank you for the download.
If you enjoy using this app, would you mind taking a moment to rate it in AppStore?
And please send us any comments, bug reports, English mistakes, and suggestions.
When you contact me, please send mail to
In addition, you may not necessarily be able to answer to additional feedback from you. Your understanding is requested.
Thank for your support.

© 2013
All Rights Reserved.


Tuning uses TN-1G.

1. First, please check the settings of TN-1G.

Look at the meter.
You are unable to see `Capo: `, are you?

[howto nocapo]

If you see `Capo: `, press here.
[tool capo]
Select `None`.
[tool capo]

Look at info-window in the center of the screen.
Reference Pitch: Can you see `A440`?
Tuning set: Can you see `Standard`?
[info window]

You can change the setting of reference pitch here.
[set ref pitch]

You can change the setting of tuning set here.
[set tuning set]

2. Turn on Manual-Mode.
[auto button manual]
You can turn the switch on by tapping a few times.

3. Tap the button on the far left, and select the E-string.
[select 6th]

4. Please pluck the E-string(thickest string) of your guitar.

Take care to not sound other strings.

5. Look at the meter.

[meter too low]
The sound of your guitar is too low in target pitch. Wind the tuning peg up slowly that until the needle points `0`.

[meter low]
The sound of your guitar is low against target pitch. Wind the tuning peg up slowly that until the needle points `0`.

[meter too high]
The sound of your guitar is too high against target pitch. Loosen the tuning peg to that the needle is to come to the left of `0` once back, and wind the tuning peg up slowly that until the needle points `0`.

[meter high]
The sound of your guitar is high against target pitch. Loosen the tuning peg to that the needle is to come to the left of `0` once back, and wind up the tuning peg slowly that until the needle points `0`.

When the sound of the guitar is higher than the target pitch (or gone to the right side over `0`) , loosen the strings once. You make the needle that matches to `0` by while winding up. By doing so, the string does not loose easily, and the pitch will stable.
[loose and wind up]

[meter in tune]
Since the needle is pointing to `0`, the pitch is in tune with the target.

Octave higher from target pitch, and in pitch of octave lower, TN-1G was made needle to point to 0. From this, TN-1G displaying `too high`, and pitch of your guitar is further increased, the meter will be displayed as `too low`.
For this reason, you wind up the string, is very dangerous that break a string, even if the meter is shown as `too low`. If you're a guitar beginner, then it is necessary that people who can well to tuning your guitar. Please use TN-1G only to fine-tune.

6. In the same way, tune to high-E-string from A-string.

7. After tuning up to high-E-string, back to the E-string. Please check up to high-E-string.
[check again]
In all strings, the meter needle to the point to `0`, please repeat tuning. Depending on the strength of the neck of your guitar, or the gauge of the string set, you may need to be repeated many times.

8. In all strings, the meter needle points to `0`, tuning is complete.
A guitar is a musical instrument that will be off pitch eased. You need to tune always before you play.
© 2013
All Rights Reserved.


How to create a beat pattern.

(1). Open `Beat Patterns` and tap `Edit`.


(2). A pattern list is to be edit-mode. Tap the green (+)button that you make a choice.


(3). A new pattern is created.


(4). Tap `Done`, edit-mode is finished.


© 2013
All Rights Reserved.


How to delete a beat pattern.

(1). Open `Beat Patterns`. Swipe left that you want to delete.


(2). A delete button appears, and tap it.

© 2013
All Rights Reserved.


How to share beat pattern via AirDrop.

With AirDrop, you can share the beat pattern with people nearby with an Apple device.
You also need to turn on Wi-Fi and Bluetooth.
For more information about the AirDrop, see Use AirDrop to wirelessly share content by Apple.

This is an example of sending beat pattern from Taro to Ichiro.

(1). Please upgrade to latest TN-1G(or TN-1B) each iPhones.
(2). Make sure that each iPhone Wi-Fi and Bluetooth enabled.

(3). Enable AirDrop both iPhones.
Swipe up from the bottom of the screen, open Control Center.

Turn enable AirDrop.

(4). Taro starts TN-1G, and choose a beat pattern that he wants to send.
Ichiro unlocks screen of his iPhone.


(5). Tap share button on Taro's iPhone. He chooses `Share beat pattern via AirDrop`.


(6). Ichiro's iPhone is found, the icon will appear, tap it.


(7). The message is appearing on Ichiro's iPhone, and choose `Accept`.


(8). Ichiro can choose which app to open data with. Select `TN-1G`(or `TN-1B`).


(9). TN-1G(or TN-1B) is started. And the message is shown.


(10). Taro's beat pattern has been added.


(11). We recommend that each iPhone AirDrop disables for security reasons.


Check the version of TN-1G when the error is displayed.

[import error]

© 2013
All Rights Reserved.


How to share beat pattern via email.

This is an example of sending beat pattern from Taro to Ichiro.

(1). Please upgrade to latest TN-1G(or TN-1B) each iPhones.
(2). Taro starts TN-1G, and choose a beat pattern that he wants to send.


(3). Tap share button on Taro's iPhone, and choose `Share beat pattern via email`.


(4). New message screen of the email appears.
Please enter the address and subject.


(5). Ichiro received email.


(6). Long tap the attachment file.


(7). Ichiro can select apps to open attachments, choose `TN-1G`(or `TN-1B`).


(8). Start TN-1G(or TN-1B), and the message is shown.


(9). Taro's beat pattern has been added.


Check the version of TN-1G when the error is displayed.

[import error]

© 2013
All Rights Reserved.


How to share with other apps.

This app can share rhythm pattern data with other apps(e.g. TN-1B, DR, and Maelz DX Pro) in your iPnone.
[share with other apps]
This is an example that sends data from TN-1G to TN-DR.
Open the data that you want to send, and tap the share button.
[share with other apps01]

Select `Share with other apps`.
[share with other apps02]

Data is exported to common area.
[share with other apps03]

Close TN-1G, and open TN-DR. Tap the import button.
[share with other apps05]

The data is imported from a common area.
[share with other apps06]
© 2013
All Rights Reserved.


Main Controls

[main screen]

(1). Pitch Meter:
Target pitch is the point of zero.

(2). Information of Notes:
Display a tuning set name and frequency of the target note.

(3). String Button:
From left, E, A, D, G, B, high-E string.
On auto mode, these buttons become an indicator of detecting string.

(4). Mode Button:

[auto button off]
Off-mode: meter stops.

[auto button manual]
Manual-mode: switch target string by string-button.

[auto button on]
Auto-mode: switch target string automatically.
You cannot use harmonics on 12th-fret.

[auto button on 8va]
Auto-mode(one octave higher): switch target string automatically.
This is auto-mode for harmonics on 12th-fret.

(5). Tuning Fork:
The sound is when you tap. The sound will stop when you tap again.
The pitch is `A` on Auto-mode.

(6). Settings Button:
It will transition to Settings Screen.

(7). Beat Pattern List Button:
It will transition to Beat Patterns Screen.

(8). Capotasto Button:
You can choose a position of capotasto.

(9). Help Button:
This page you are looking at now is displayed.

(10). Cent Gauge:
It indicates the pitch in cents. One scale mark will correspond to 1 cent.

[cwnt gauge]

(11). Menu Button:
It displays tuning set menu.

[main screen02]

(12). Standard Pitch A:(Hz):
Set the standard pitch of A.

(13). Tuning Set List:

© 2013
All Rights Reserved.



[settings screen]

(1). How to use TN-1G:
You can find Welcome Tutorial and instruction videos.

(2). Background:
You can choose a wallpaper of Main Screen.

(3). Note Notation:
You can change the language of note notation.
English(C, C#, D, E… , B)
Italian(Do, Do#, Re, Mi… , Si)
German(C, Cis, D, E… , H)
French(Ut, Ut#, Ré, Mi… , Si)
Chinese(C, 升C, D, E… , B)

(4). Proximity sensor works:
In manual mode, switch target string by press string-button.
But, when this switch is turned on, it is possible to select right side button by moving your hand closer to the device.


[touch photo]
This feature uses proximity sensor. The proximity sensor is located near the earpiece. Close your finger to the earpiece, this feature works.

[check again]

This feature is disabled on devices(e.g. iPod touch) that do not have a proximity sensor.

(5). Tablature:

(6). Permute Tuning Set Menu:
You can move a tuning set that you use frequently on the top of the menu.

(7). Remove Ads:
It will transition to Purchase Screen. You can buy `Remove Ads` function(In-App Purchase).

© 2013
All Rights Reserved.


Drum Machine

[drum machine screen]

(1). Beat Indicator:
You have bought `Remove Ads`, this indicator appears.

(2). Name:

(3). Beat Selector:
You can select the number of items in a beat.

(4). Tempo(BPM):

(5). Start/Stop:

(6). Length of Pattern:
You can set the length of a beat pattern cycle between 4 and 32.

(7). Beat Indicator:

(8). Tracks:
From the top is closed hi-hat, half closed hi-hat, snare drum, bass drum.
You have bought `Remove Ads`, a track of half closed hi-hat can be changed.

(9). Share Button:
You can send a beat-pattern to your friend via AirDrop or email.
This data is a common use with TN-1B(bass tuner), you can share the rhythm pattern with the bassist of your band.
Please look at `How to share via AirDrop` or `How to share via email`.

(10). Trial Button:

(11). Tempo Button:
You can change the tempo(BPM).

© 2013
All Rights Reserved.



[tablature screen]

(1). Staff and Note:

(2). Tablature:

[tab staff]

(3). Picker for notes:

(4). Fingerboard image:

(5). Settings:
You can change the musical key on the staff.

© 2015
All Rights Reserved.