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The 11 best guitar tuners 2021: top tuning pedals, clip-on tuners, and guitar tuning apps for all your playing needs

The 11 best guitar tuners 2021: top tuning pedals, clip-on tuners, and guitar tuning apps for all your playing needs
(Image credit: D'Addario)

They don't tell you this at Rock Star School, but the guitar tuner is a crucial if unglamorous tool for any electric guitar, acoustic guitar, bass guitar and ukulele player. It's probably the most important guitar accessory you'll ever buy.  

It helps you keep your weapon of choice in tune - obviously - but it also makes sure you're in tune with any other musicians you play with. In short, you need one, and if you don't already own one, our selection of the very best guitar tuners out there is the best place to start.

There are many options for the modern guitar player - including tuner pedals, headstock clip-ons, handheld guitar tuner apps for your smartphone or iPad - but none of them should set you back too much.

So, whether you're just tuning up your acoustic guitar for the first time or using one to set up your guitar's intonation, we've got you covered.

Best guitar tuners: MusicRadar's choice

We can't really find fault with the TC Electronic PolyTune 3. The original PolyTune genuinely changed things up in the guitar tuner market and the latest edition adds buffered or true bypass. OK, this is a feature for pedal-heavy players, but it's always good to have the option.

If your budget is smaller and if headstock tuners are more suited, the D'Addario NS Micro is a thoroughly decent choice. It's small enough so you won't know it's there, but accurate and cost-effective enough to make it ideal for anyone and any situation.  

If you’re after more in-depth information about the best guitar tuners, click the ‘buying advice’ button above. If you’d rather get straight to the products, keep scrolling. 

Best guitar tuners: Product guide

Best guitar tuners: TC Electronic PolyTune 3

1. TC Electronic PolyTune 3

The best polyphonic pedal tuner, now with added buffer

Launch price: $99/£95 | Accuracy: 0.02 cents | Modes: Polyphonic, chromatic, strobe | Bypass: True bypass or buffered

Highly accurate
Polyphonic tuning
Switchable buffer

TC Electronic is the first name in polyphonic tuning (which allows you to tune all strings at once), and its latest incarnation is its best pedal tuner yet. The third entry in the PolyTune line boasts a built-in BonaFide Buffer, which offers players the choice between all-analogue buffered bypass and true bypass, adjusted via internal DIP switches. 

Buffered bypass is useful for boosting a signal along long cable runs or large pedalboards. Elsewhere, the pedal packs the same features as the PolyTune 2, including an ultra-bright LED display, polyphonic and chromatic tuning modes and a +/- 0.02-cent accurate strobe tuner.

Best guitar tuners: D'Addario NS Micro Tuner

(Image credit: D'Addario)

2. D'Addario NS Micro Tuner

The best guitar tuner if you want a headstock option

Launch price: $21/£15 | Accuracy: 0.3 cents | Modes: Chromatic, metronome

Tiny dimensions
Always on your guitar
No polyphonic tuning

Headstock tuners don’t get much smaller than this, but the NS Micro Tuner doesn’t sacrifice functionality thanks to an easily adjustable screen, multiple calibration modes and even a visual metronome. It’s easy to attach to the front or back of your guitar’s headstock, too, and will be invisible to all but the most eagle-eyed of audience members. 

There's no problems fitting it to just about any instrument with a headstock, whether that's electric, acoustic, classical, bass, banjo, mandolin, ukulele or upright bass. Its discreet appearance, low price and quick tuning response make it the best headstock guitar tuner around.

Best guitar tuners: Korg Pitchblack Advance

3. Korg Pitchblack Advance

A tech-loaded pedal tuner with long-lasting battery life

Launch price: $89/£69 | Accuracy: 0.1 cents | Modes: LED, strobe, half-strobe, mirror | Bypass: True bypass

60-hour battery life
Noise-free power sharing with other pedals
No polyphonic mode
Not the most accurate pedal tuner

Korg's Pitchblack design has been refined many times over its eight-year lifespan – its mini and polyphonic editions being the most notable – but with the Pitchblack Advance, the company reckons it's crafted "the ultimate pedal tuner". Key among its new features is a fantastic 60-hour battery life from alkaline nine-volts, as well as the ability to limit power supply interference via "software control". 

The pedal's slanted design offers improved visibility, aided by high-brightness colour LEDs, which nearly double the size of the note name display and are easily viewable in all light conditions. Accuracy in strobe mode is +/- 0.1 cents, while other meter display modes include regular, half-strobe and mirror mode. True bypass switching is also onboard, as is a low-noise dedicated DC out to share a 9V power supply with other pedals.

Best guitar tuners: Boss TU-3 Chromatic Tuner

4. Boss TU-3 Chromatic Tuner

The industry standard pedal tuner

Launch price: $99/£80 | Accuracy: 0.1 cent | Modes: Chromatic, strobe | Bypass: Buffered

Rock-solid build quality
Drop tuning functionality
Not everyone wants buffered bypass
No polyphonic function

Boss created an industry standard with the TU-2 pedal tuner in 1998, and its successor offers a number of improvements on the classic format. The TU-3 is quoted at +/-1 cent over a 23-segment LED display, which means it tunes more accurately. Other functions include drop tuning up to six semitones and bass tuning up to three flats. 

A new high brightness mode means that maximum current draw is up from 55mA (TU-2) to 85mA. Using the recommended Boss supply and a PCS-20A daisy chain, the TU-3 will also pass power to a total of 200mA to up to seven other pedals. Boss is resisting true bypass switching, which may be an issue for the tone-obsessed, but the usual Boss buffered output helps when using long leads and numerous pedals.

Read the full Boss TU-3 Chromatic Tuner review

Best guitar tuners: Fender Tune

5. Fender Tune guitar tuner app

The best guitar tuner app available on iOS and Android

Launch price: Free | Modes: Auto tune, manual, chromatic

It's free!
Easy to use
Great for beginners
In-app purchase required for increased accuracy

Available for both iOS and Android, Fender's first ever app aims to deliver an intuitive, easy-to-use interface that makes it easy for newcomers to get their instrument in tune, while also covering basic tone tips, including strumming and setting up amps. 

The app detects notes from acoustic guitars and amplified electrics, and offers auto tune, chromatic and manual tune modes, including alternate tuning options and the ability to create custom tunings. Additional in-app purchases add a more visually precise Pro Tuner, metronome and drum beats, plus scale diagrams and chord finder.

More info: Download Fender Tune for Android

Best guitar tuners: Snark ST-2 Super Tight tuner

(Image credit: Snark)

6. Snark ST-2 Super Tight tuner

One of the best guitar tuners that does all the basics well

Launch price: $19.99/£19.99 | Type: Clip-on chromatic tuner | Tuning range: Not specified | Calibration range: A4 = 415Hz-466Hz | Accuracy: Not specified | Modes: Microphone/vibration chromatic mode / metronome

Works with guitar, bass and more
A cheap guitar tuner
Tune with vibration sensor or microphone
Styling won’t suit everyone

Though there are several pricier and fully featured tuners here, Snark’s ST-2 is aimed at the player who wants just the bare essentials. So, what might those essentials be?

First of all, the ST-2 tracks quickly. Set it to the vibration sensor and it’ll work just fine in all but the loudest of gigs. The microphone is for acoustic instruments of course, so you’ll need some peace and quiet.

Second, the clip is robust and the screen is easily angled – a surprisingly important feature because clip-ons have to fit in around tuning machines on six-string guitars, 12-strings, mandolins, basses… you get the idea!

At this price it’s worth having an ST-2 around even if you only keep it in a gig bag.

Best guitar tuners: TC Electronic Polytune 3 Mini

(Image credit: TC Electronic)

7. TC Electronic PolyTune 3 Mini guitar tuner

Low on pedalboard space? This is the best guitar tuner for that

Launch price: $89/£71 | Accuracy: 0.02 cents | Modes: Polyphonic, chromatic, strobe | Bypass: True bypass

Tiny footprint
Viewable in all light conditions
Polyphonic tuning

A downsized version of the sequel to TC Electronic's groundbreaking polyphonic tuner, the PolyTune 3 Mini allows players to tune all strings simultaneously, while a chromatic strobe option offers 0.-2-cent tuning accuracy. 

True bypass switching, an ultra-bright LED display that adapts to different lighting conditions, and the option of up to five semitones flat tunings only sweeten the deal, and make this the mini pedal tuner of choice when pedalboard space is at a premium.

Best guitar tuners: Korg AW-OTG POLY

8. Korg AW-OTG POLY guitar tuner

A clip-on tuner with polyphonic tuning capability

Launch price: $79/£56 | Accuracy: 0.1 cents | Modes: Needle, strobe, 9 animated modes

Polyphonic tuning
Great battery life
Chord Finder function
Animated modes are fun for kids

The AW-OTG POLY (guitar) and AW-OTB-POLY (bass) feature OLED screens for smooth visibility at all angles, while their polyphonic function allows you to strum all strings at once and check they’re in tune. Accuracy is down as +/-0.1 cents, while a strobe feature further improves that figure. 

Other features include 18-hour battery life from one AAA, plus alternative tuning animations “to make tuning fun” - these include a slot machine, bowling pins and a heart monitor-style display. There's also a Chord Finder, which detects what chord you're playing and displays it on the screen.

Best guitar tuners: D'Addario NS Micro Soundhole Tuner

9. D'Addario NS Micro Soundhole Tuner

A handy tuning solution for acoustic guitarists

Launch price: $42.80/£19.90 | Accuracy: 0.3 cents | Modes: Automatic, manual

Tiny proportions
Quick response
Can't be seen by audience members
Can't be used on electrics

It's not the first acoustic soundhole tuner we've seen, but D'Addario's Micro Soundhole Tuner is certainly the smallest and least intrusive. Mounted via a non-marking universal mounting clip, the tiny chromatic tuner is concealed within your guitar's soundhole. 

A highly sensitive piezo transducer detects vibrations from the soundboard, promising fast and accurate tuning response, while the bright display makes for easy viewing. The NS Micro Soundhole Tuner is designed for acoustic guitars, basses and ukuleles, and offers an A435-455 calibration range.

Best guitar tuners: Peterson StroboStomp HD tuner

(Image credit: Peterson)

10. Peterson StroboStomp HD tuner

Boasts optimised presets for 135 tunings

Price: $129/£119 | Type: Pedal | Tuning range: C0-A#8 (16.35Hz-7302Hz) | Calibration range: A4 = 390Hz-490Hz | Accuracy: +/- 0.1 cent | Modes: One screen mode / 135 tuning presets

LCD screen visible even in bright light
135 ‘sweetened’ tuning presets
True-bypass and buffered output modes
Too expensive for some

Famed for their accuracy, Peterson strobe tuners have long been the choice of pros seeking the highest quality gear, and 2019 saw the company unveil what it considers to be ‘the ultimate pedal guitar tuner’ – the StroboStomp HD.

Boasting a feature set far beyond most of its rivals, you’ll find both true and buffered bypass modes, plus 135 ‘sweetened’ tunings – micro-adjusted reference pitch points optimised for a variety of instrument types and altered tunings. You can even save your own presets.

Of course, this level of nerd-ish tweakery can only be employed by the most precise tuners – and the StroboStomp HD delivers 0.1 percent accuracy. Enough for the most discerning of ears.

Best guitar tuners: Band Industries Roadie 3

(Image credit: Band Industries)

11. Roadie 3 motorised tuner

The best motorised guitar tuner you can buy

Price: $129/£142 | Type: Motorised automatic tuner | Accuracy: +/- 2 cents | Modes: 100+ tuning presets

Takes the hassle out of tuning
Suitable for guitars, banjos, ukuleles, mandolins
More accurate tuners are available
Bass version required for bass guitar

Automatic motorised guitar tuners aren’t exactly commonplace - but is that about to change? The Roadie 3 uses its vibration sensors to figure out the pitch of a string, and then adjusts it to a preselected note. Just pick a machine head, and let your very own roadie do the hard work, at up to 120rpm.

If completely automatic tuning wasn’t enough to tempt you, consider that Roadie 3 comes equipped with over 100 built-in tuning presets. Fancy having a go in DADGAD or Open G? All you need to do is access them via the onboard LED screen. Roadie 3 also has an integrated metronome to help you make timing problems a thing of the past, and an improved peg connector means it’ll fit even more instruments.

Best guitar tuners: Buying advice

Best guitar tuners: TC Electronic Polytune Mini and Peterson Strobostomp

(Image credit: TC Electronic/Peterson)

When it comes to buying the best guitar tuner for your needs, you have what we'd call a 'good limitation' – meaning there aren't hundreds of different variations to choose from. It's not like overdrive pedals, where the options can be pretty overwhelming. 

There are three main types of tuner, each with their own pros and cons. Get to grips with them and you’ll find it easier to choose the best guitar tuner for you:

  • Polyphonic tuners - A more recent design, allowing you to play all six strings together, with a display showing how in or out of tune all six are at once. Clever, huh? Those displays can take a bit of getting used to but once you do you’ll find tuning on the fly much easier. 
  • Chromatic tuners - ‘Chromatic’ just means that the tuner only identifies one of the 12 notes of the chromatic scale in Western music. Very useful indeed, but you’ll be playing one note at a time to tune. Most cheaper guitar tuners will be Chromatic, so this is probably the place you'll start.
  • Strobe tuners These tend to be the most accurate tuners of all – usually reflected in a higher price. They're certainly not necessary for beginners, but pro players and guitar techs swear by them.

In terms of application, tuners fall into one of a small number of categories – pedal or headstock. That being said, tuning via mobile devices has improved immensely in recent years and is hard to beat in terms of convenience. 

Pedal tuners are among the most popular. With a pedal tuner, you're looking for durability and accuracy. Durability covers the build-quality and ruggedness of the tuner. It'll likely find a home among your other pedals and is the pinnacle of set-and-forget. Place it in the chain in the desired location – usually at the start – and it'll sit there quietly doing its job whenever called upon.

You'll likely want to consider 'true bypass' as a feature if it is to be part of a wider pedalboard. A poor signal at the start can be made even worse once it hits gain pedals and tube amps, so this ensures the audio signal from the guitar isn't tainted in any way as it travels through the rest of the chain.

Headstock tuners are a different kettle of fish, desired for their simplicity as much as their scaled down designs. They sit at the end of the guitar and interpret intonation through vibration. Where once these tuners were cheap and cheerful, and rarely made it out of the practice room, nowadays they can boast some seriously useful tech. 

The new kid on the tuning block involves the phone or tablet you're possibly reading this article on now. For bedroom practice sessions, they're ideal too as they're quick to use, accurate and often inexpensive - but start tuning up halfway through your first gig with your phone, and people will start asking questions.

This list of the best guitar tuners has something for every player, whether it's a sturdy, solid gig staple you're after, or a simple but reliable option for backup.