The humble guitar tuner remains an essential tool for electric, acoustic and bass players - not only does it help you tune up your own instrument, it ensures you're in tune with the rest of the band, too.
Nowadays, there's a huge range available, from pedals to clip-on headstock tuners, handhelds and, increasingly, free and paid-for apps for your phone or tablet.
Here, we've rounded up the best tuners in the world, for players of all abilities, so whether you're tuning a guitar for the first time or using one to set up your guitar's intonation, we've got you covered.
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
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.
More info: TC Electronic PolyTune 3
2. D'Addario NS Micro Tuner
The best headstock tuner for guitars
Launch price: $21/£15 | Accuracy: 0.3 cents | Modes: Chromatic, metronome
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.
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
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 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.
More info: Korg Pitchblack Advance
4. Boss TU-3 Chromatic Tuner
The industry standard pedal tuner
Launch price: $99/£80 | Accuracy: 0.1 cent | Modes: Chromatic, strobe | Bypass: Buffered
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 review: Boss TU-3 Chromatic Tuner
5. Fender Tune
One of the best tuner apps available on iOS and Android
Launch price: Free | Modes: Auto tune, manual, chromatic
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: Fender Tune
6. TC Electronic PolyTune 2 Mini
Low on pedalboard space? This is the best mini pedal tuner
Launch price: $89/£71 | Accuracy: 0.1 cents | Modes: Polyphonic, chromatic, strobe | Bypass: True bypass
A downsized version of the sequel to TC Electronic's groundbreaking polyphonic tuner, the PolyTune 2 Mini allows players to tune all strings simultaneously, while a chromatic strobe option offers 0.1-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.
More info: TC Electronic PolyTune 2 Mini
7. Korg AW-OTG POLY
A clip-on tuner with polyphonic tuning capability
Launch price: $79/£56 | Accuracy: 0.1 cents | Modes: Needle, strobe, 9 animated modes
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.
More info: Korg AW-OTG POLY
8. Peterson iStrobosoft
The most accurate tuner app on iOS and Android
Launch price: $9.99/£9.99 | Accuracy: 0.1 cents | Modes: Automatic, manual
For many professionals, strobe tuners have been the way to go for years, and Peterson is the company synonymous with them. The iStrobosoft for iOS and Android works best if you plug your guitar into the iPad using your usual input device, or use Peterson's own adaptor cable or mini capsule mic, which are available separately. For acoustic guitars, the iPad's built-in mic works just fine. A chromatic tuner with all features on the main screen and no hidden menus, the iStrobosoft has glowing flat/sharp indicators and displays the note and octave with a cents display showing how far out it is. The main strobe display, with its four bars of moving bands, looks great on the iPad and can be easily seen from across a room. With accuracy to 1/10 of a cent, Peterson says that iStrobosoft offers the highest degree of precision available in a tuner app. And that makes it great not only for tuning but also for making intonation adjustments if you set up your own instruments. For the asking price, this has to be considered a genuine bargain. And as long as you have your Apple device and a connector with you, you'll never be without a tuner.
Read the full review: Peterson iStrobosoft review
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
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-marring 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.
10. Sonic Research Turbo Tuner ST-300 Mini
The most accurate mini pedal tuner on the market
Launch price: $129/£139 | Accuracy: 0.02 cents | Modes: Chromatic, guitar, bass, standard, drop D, six-string bass | Bypass: True bypass
The Sonic Research range of true stroboscope tuners has been praised for its units' instant response and extreme accuracy, featuring an LED ring driven directly by the guitar signal and electronically strobed. The ST-300 Mini tuner puts that technology, with a stated accuracy of 0.02 cents, in a pedal the size of TC's popular PolyTune 2 Mini. Of the six modes, chromatic mode displays the pitch of the plucked string, but there are also guitar and bass modes with a string number instead. Both of these and the remaining three are custom modes, so you can program and store altered tunings. For drop tunings, a facility lets you lower the pitch of all notes below the regular tuning from one to six semitones, but there's no pitched-up capo tuning facility. Note detection is fast and the display is intuitive, but it's a matter of personal taste whether you prefer spinning LEDs or getting a stable green light as found on other tuners. If you're after a tiny tuner for your 'board, but don't need that polyphonic capability to show you which string is out of tune at a glance, and you also use altered tunings, then this may be the one for you.
Read the full review: Sonic Research Turbo Tuner ST-300 Mini