I tested Gtech's first ever straightener, and it's a promising start from the vacuum king

Gtech StyleOnic: two-minute review

In the hunt for the best hair straighteners, Gtech may not be a brand that immediately jumps to mind. However, with the launch of the StyleOnic Turbo ION hair straightener (and Gtech DryOnic hair dryer alongside) the brand known mainly for its excellent vacuum cleaners has moved into haircare.

Designed to reduce frizz, boost shine, and make styling easy, the StyleOnic uses ionic technology and ceramic plates to create smooth, sleek results, and soft curls. It also features an LED display that shows each of the 10 precise temperature controls, ranging from 140 C / 285 F to 230 C / 445 F, making it suitable for a wide range of hair types and styles.

In testing, the StyleOnic performed well at straightening my long, fine, naturally-curly hair; heating up quickly and gliding smoothly without snagging. It wasn't as smooth as other straighteners, like the GHD Chronos (learn more in my GHD Chronos review), but still impressive. The beveled edges make it easy to create curls or waves, although the results were often inconsistent – largely because I often had to squeeze the 1 in / 2.5cm plates together harder than I would have liked to make sure the whole hair strand was evenly styled, which caused my hand to ache.

I liked the lightweight, slim dimensions of the StyleOnic. It weighs 8.4oz / 239g and measures 9.8in / 25cm and these dimensions, coupled with its heat-protective case, makes it great for travel or storage. However, the styler itself has a cheap-looking build, caused by its mix of materials and colors. Elsewhere, it's difficult to press the temperature button because of where it's positioned on top of the styler. I often struggled to get enough purchase to change the setting without the plates hitting together.

I feel like these flaws are a sacrifice you make for the StyleOnic's price, though. Gtech isn’t trying to compete with salon-grade brands like GHD or Dyson, but instead offers a practical, relatively affordable alternative with a focus on convenience. This makes it a worthwhile option if you prioritize portability and ease of use over high-end design and flawless performance. Just don't expect miracles.

Read on for my full Gtech StyleOnic review...

Gtech StyleOnic review: price & availability

• List price: £99.99
• Available: UK only
• Launched: January 2025

The Gtech StyleOnic costs £99.99 and is only currently available in the UK direct from Gtech, or a range of third party retailers. Gtech is yet to confirm if, or when, it will be sold in other regions. For this price, you get the styler, a protective heat glove and a storage bag.

The Gtech StyleOnic sits alongside other lower mid-range models including the BaByliss Hydro-Fusion and Bellissima Italia Creativity Infrared. One of my favorite stylers, the mdlondon STRAIT, is marginally more expensive at £109 but is one of the closest like-for-like models in terms of design, features and specs.

In the STRAIT's favor are its longer plates – 11cm vs the Gtech's 8.9cm. This makes them better suited to different hair lengths and make it great for curling. It also offers 11 temperatures versus the Gtech's 10 settings. Beyond this though, both the StyleOnic and STRAIT are very similar with digital displays, swivel cords, auto-shut off features and a range of colors.

The Gtech StyleOnic slightly takes the edge against the BaByliss model by offering twice number of temperature settings. BaByliss doesn't have a digital display but everything else is near-on identical, from its ceramic plates, ionic technology, shape and size.

The Bellissima model is a better option if you have damaged hair. The infrared technology – one of the biggest hair trends of the moment – styles the outer layers of the hair without stripping moisture from the inside. The rest of its settings are the same, although the clunky design of the Bellissima leaves a little to be desired.

All this considered, the Gtech StyleOnic is good value for money in terms of the range of settings and features it offers, and the safety extras you get as standard. Little separates it from other straighteners in its price bracket and it's not reinventing the wheel, but it's a solid debut nonetheless.

• Value score: 4 out of 5

Gtech StyleOnic specs

Gtech StyleOnic review: design

• 1 inch wide, ceramic-coated plates
• 10 different heat settings
• Longer-than-usual plates

Having recently reviewed the Gtech DryOnic hair dryer, and been really impressed with its classy, premium design, I was a little disappointed with how the StyleOnic looks.

I tested the Oyster model and while I liked the satin finish of the cream-colored areas, and the gold accents on the plates and controls, they were let down by the black, glass band found on the top – which houses the LED display. This mix of materials makes the StyleOnic not only look cheap, but feel cheap in the hand.

At the base of the styler is a 2m / 6.5ft cord. This is shorter than the 3m average, and while it'll be fine if you have a power outlet positioned near your dressing table area, it'll get annoying quickly if you don't.

Above the display, where the black glass meets the cream plastic are two thin buttons – one turns the straighteners on and off; the other is used to cycle through the 10 heat settings. Rather than having specific styling modes, the StyleOnic Turbo ION relies on you knowing which heat setting best suits your hair type. This is great in terms of versatility, but can take some experimentation.

The 10 temperature settings are:

• 140 C / 284 F
• 150 C / 302 F
• 160 C / 320 F
• 170 C / 338 F
• 180 C / 356 F
• 190 C / 374 F
• 200 C / 392 F
• 210 C / 410 F
• 220 C / 428 F
• 230 C / 446 F

If you have thicker or longer hair, or your hair has been damaged from chemicals or over-styling, you'll get much more use and benefit from having such a wide temperature range. I've never needed such a wide range because my fine hair is pretty malleable. However, I welcomed the ability to drop or increase the heat as and when needed.

It takes over a minute to heat up to the maximum 230 C / 445 F, which is more than twice the length of rival stylers from the likes of GHD and T3. However it should be noted, the 30-second heat-up time of these alternative stylers takes their respective plates to ~185 C / 365 F, which is considerably cooler than Gtech's model.

To switch the styler on and adjust the temperature, you need to apply a fair amount of pressure to the buttons for them to register. However, because these buttons are positioned on the outer side of the top plate, it’s difficult to get enough grip to do so. To apply the necessary pressure, you first have to squeeze the plates together to prevent the styler from shifting and becoming a safety hazard. Or you have to place your fingers on the underside of the arm, which can feel dangerous when the plates are on.

You can see when the straightener reaches your chosen temperature via the LED display and even though I don't love how big the display is, from an aesthetic point of view, it does make it quick and easy to see the setting at a glance.

The plates are the standard 1 in / 2.5cm wide and 3.5 in / 3.8cm long but the StyleOnic is noticeably lighter and more compact than other straighteners I've tested. It weighs just ‎8.4oz / 239g and measures 9.8 x 1.5 x 1.5" / 25 x 3.8 x 3.8cm. This makes it compact and light enough for easy handling and for packing in a suitcase or bag, without being too small to work on longer hair.

I also appreciated other smaller touches which helped to alleviate some of my design disappointment. Namely the travel lock, which helps keep the plates closed when not in use; a 30-minute auto shut-off; its travel case and safety glove.

• Design score: 3.5 out of 5

Gtech StyleOnic straightener review: performance

• Wide range of temperatures suit multiple needs and hair types
• Beveled edges great for curling
• Smooth but inconsistent styling

Given Gtech’s reputation for practical, well-designed home appliances, I was hoping the StyleOnic would follow suit. While it can't quite compete with more expensive straighteners I've tested, the StyleOnic still does a good job of creating frizz-free, smooth styles. Albeit with some caveats.

The straightener isn't the fastest. Not just in terms of heat-up time, but in how long it took to style my hair. I found I needed to make multiple passes at times to fully straighten sections, even on higher settings. This increased styling time (to an average of four minutes) as well as the potential heat damage.

The StyleOnic also isn't the smoothest flat iron I've tried (that prize goes to the GHD Chronos), but its ionic technology and ceramic plates do smooth and seal the hair well. While the styler's beveled edges make curling easy, allowing for waves and movement without leaving sharp creases.

Across the board though, performance varied and these results were inconsistent. That's largely because of the way the plates are positioned.

Both plates 'float' within their respective arms, which means they move slightly to follow the flow of your hair. However, they sit closer to each other at the tip of the styler than where they meet at the hinge. This is deliberate, to allow you to create different sized curls, but it also means the pressure on the hair isn't consistent all the way down the plates. I found the best way to guarantee a more even finish was to squeeze the arms harder than normal, but that caused my hand and wrist to ache.

If you get the pressure and temperature just right, the style not only looks great but it lasts for hours, though. Curls that would usually drop stayed defined and in place until I got home from a night out. Plus, the swivel cord gives plenty of room and movement, and the weight of the straightener is balanced enough that it helped relieve some of the aching from gripping the plates together.

As my hair is naturally curly, I usually only use a flat iron to knock out this frizz rather than straightening it completely. Super sleek, straight styles tend to leave my thin hair looking limp and flat, and this was the case with the Gtech StyleOnic. This says more about my hair than the styler itself, though. If anything, for people with thicker, coarser hair or for those looking for super sleek styles, this may be a positive, and exactly what you're after.

• Performance score: 3.5 out of 5

Should I buy the Gtech StyleOnic?

Buy it if...

Don't buy it if...

How I tested the Gtech StyleOnic

• Tested a range of temperature settings
• Created a range of straight and curly looks

For my Gtech StyleOnic Turbo ION hair straightener review, I spent two weeks using it as my main hot styling tool. I created a series of looks for different occasions including straight, curly and wavy styles and put the range of temperature settings to the test. I timed how long the styles took to complete, how well they lasted and monitored the finish and condition of my hair.

First reviewed: February 2025