KOIOS 4-In-1 vs. Chefman Cordless Side-by-Side Comparison

Tina Pham
Tina Pham
Reviewer
Nguyen Ntk
Nguyen Ntk
Visual Specialist
Reviewed
Our recommendations are made independently through research and testing following our review procedure. We may receive commissions from purchases made via our links at no additional costs to you.
Tested Using Methodology v1.0
Updated Nov 28, 2022
Tested Using Methodology v1.0
Updated Dec 1, 2022
KOIOS 4-In-1 Immersion Blender Review
Chefman Cordless Immersion Blender In-depth Review
Blender type
immersion
immersion
Power
800W
0W

Our Verdict

8.0
Overall Score
  • Performance (50%)
    7.9/10
  • Design (20%)
    7.6/10
  • Usability (30%)
    8.3/10
8.0
Overall Score
  • Performance (50%)
    7.7/10
  • Design (20%)
    7.4/10
  • Usability (30%)
    8.8/10

The KOIOS 4-in-1 is our choice for the best budget immersion blender and there’s a good reason for that. The performance is fine for a machine in this segment. With a mid-range motor, this blender is moderate at preparing hot soup, frozen fruit smoothies, and mayonnaise. Its whipping capability is also very impressive thanks to the included whisk attachment. 

Our comparison showed the Chefman Cordless to have plenty of redeeming virtues as well. We particularly liked its smoothie-making performance, which is ranked among the tops. In the remaining tests, it shared roughly the same performance, except for beating eggs. 

For overall build, the KOIOS 4-in-1 has been developed with a lot of stiff plastic. The Chefman Cordless feels a bit plasticky in areas, too, but it at least has the look of quality and luxury.

Performance

7.9
Performance Scores
  • Hot Soup Purée (35%)
    7.5/10
  • Frozen Fruit Smoothie (30%)
    7.8/10
  • Mayonnaise (15%)
    9.8/10
  • Almond Milk (15%)
    7.5/10
  • Whipped Egg-Whites (5%)
    7.0/10
7.7
Performance Scores
  • Hot Soup Purée (35%)
    7.0/10
  • Frozen Fruit Smoothie (30%)
    9.0/10
  • Mayonnaise (15%)
    8.8/10
  • Almond Milk (15%)
    8.5/10
  • Whipped Egg-Whites (10%)
    0/10
7.5

Hot Soup Purée

7.0
The KOIOS 4-in-1 Soup
KOIOS 4-In-1 Hot Soup Purée 1
  • Pureeing Time: 30 seconds
  • Result: Slightly Chunky
  • Suction: No

None of the low-range blenders we tested could yield the silkiest puree in 30 seconds, but we think the KOIOS’ results will still be acceptable to most home cooks.  In particular, the soup looked silky but when we ran it through a strainer, too many tiny bits were left behind. Nevertheless, we were still satisfied with this blender, given its consistency and smooth operation.

The Chefman Cordless Immersion Blender Hot Soup Purée
The Chefman Cordless Immersion Blender Hot Soup Purée 1
  • Pureeing Time: 30 seconds
  • Result: Smooth
  • Suction:  Slightly

The Chefman managed to create a serving of hot soup in 30 seconds. The soup wasn’t puréed to perfection since there was still a considerable amount of food flakes left behind, but for the most part, we were pleased with its smoothness. If you prefer your purée to be smoother, blend longer.

7.8

Frozen Fruit Smoothie

9.0
The KOIOS 4-in-1 Smoothie
KOIOS 4-In-1 Immersion Blender Smoothie 3
  • Blending Time: 1 min 20 secs
  • Result: Slightly Coarse
  • Suction: No

The manufacturer recommends this blender not be used to process frozen fruits. That fact made us skeptical about its overall capability. After much deliberation, we decided to stick to the initial plan, putting it through our frozen smoothie test anyway. To our surprise, its result was nearly the same as that produced by the Vitamix 5-speed immersion blender.

In less than a minute and a half, it churned out a frozen smoothie that was flavorful enough to entice our taste buds. The drink didn’t have a velvety smoothness; it was a bit grainy since the kale wasn’t entirely liquified. Despite that, it was still a sweet, creamy combination that we loved to sip on.

The Chefman Cordless Immersion Blender Smoothie
The Chefman Cordless Immersion Blender Smoothie 1
  • Blending Time: 1 min 10 secs
  • Result: Smooth
  • Suction: No

At the highest speed setting, our Chefman broke down all the ingredients quite easily — better and faster, in fact, than we expected from a blender in this segment. The test smoothie came out with a satisfying texture, combining smooth, pulverized fruits with the green of kale for a nice, chilled mouthfeel.

9.8

Mayonnaise

8.8
The KOIOS 4-in-1 Mayonnaise
  • Emulsifying Time: 1 min 10 secs
  • Result: Velvety
  • Suction: No

The KOIOS made short work of incorporating egg yolks and canola oil, churning out a harmonious texture in just over one minute. Apart from being one of the fastest, it was also among the few blenders in our test that produced exceptionally smooth emulsification. Our mayonnaise came out thick, creamy, and spreadable. For such a low-priced hand blender, this performance could hardly have been better.

The Chefman Cordless Immersion Blender Mayonnaise
The Chefman Cordless Immersion Blender Mayonnaise 1
  • Emulsifying Time: 1 min 30 secs
  • Result: Smooth
  • Suction: No

Emulsifying with the blending shaft, this Chefman cordless blender passed the mayonnaise test within a minute and a half, which was slightly faster than average. The final mayonnaise looked smooth and was well emulsified, sharing a similar texture with those produced by a whisk attachment.

7.5

Almond Milk

8.5
The KOIOS 4-in-1 Almond Milk
  • Grinding Time: 1 min 10 secs
  • Result: Fine
  • Suction: No

It was simple and easy to put together all the ingredients for a preservative-free milk using the KOIOS. Since this blender ground the nuts pretty evenly, our drink came out silky and creamy. That said, blending didn’t run smoothly; the blending beaker was too small, causing the liquid to overflow every time we moved the blender around.

If you intend to buy the KOIOS for drink preparation, don’t use the beaker that is included in its set.

The Chefman Cordless Immersion Blender Almond Milk
  • Grinding Time: 1 min 10 secs
  • Result: Very Fine
  • Suction: Yes

The Chefman cordless device may not be a bad option when you’re making nut milk. Just make sure to use a blending beaker with sufficient capacity. 

Our drink was creamy and packed with characteristic almond flavor so we think you will love it as much as we do. During our test, the blender did, unfortunately, suction itself to the beaker's bottom, causing the mixture to splatter every time we moved the blending wand. However, this wasn’t only about the suction — things would work better if we used a larger beaker.

7.0

Whipped Egg-Whites

0.0
The KOIOS 4-in-1 whipped egg-white
  • Beating Time: 2 min 40 secs
  • Result: Stiff
  • Suction: No

The KOIOS’s whisk attachment worked well — we got the perfect meringue out of the egg whites we beat with the whisk attachment. Its metal wires are bouncy and agile, so they’re flexible enough for whipping and fluffing. However, we can’t say for sure whether those wires will hold up to thick batters for bread doughs or baked cakes.

On a pragmatic note, the whole beating process lasted nearly 3 minutes, but it didn’t cause hand fatigue. We felt entirely comfortable in that prolonged operation, from start to finish. Indeed, using this blender for preparing airy, creamy desserts will help you stay creative without springing for an expensive specialty device.

The Chefman Cordless Immersion Blender Whipped Egg-Whites
The Chefman Cordless Immersion Blender Whipped Egg-Whites 1
  • Beating Time: N/A
  • Result: N/A
  • Suction: N/A

This machine’s blending shaft was unable to beat the eggs, but it shares this shortcoming with most blending shafts. If you want your machine to properly whip the eggs, we recommend choosing one that comes with a whisk attachment, such as the Braun MultiQuick-5. A whisk’s many thin wires will uncurl the protein strands of the egg whites and incorporate air into them. That way, stiff eggy peaks are able to form and stay stable.

Design

7.6
design Scores
  • Blending Shaft (30%)
    7.0/10
  • Build Quality (60%)
    7.5/10
  • Power Cord (5%)
    10/10
  • Beaker (5%)
    10/10
7.4
design Scores
  • Blending Shaft (30%)
    7.0/10
  • Build Quality (60%)
    8.0/10
  • Battery (5%)
    10/10
  • Beaker (5%)
    0/10

 In the Box

In the Box
The KOIOS 4-in-1 Immersion Blender Unboxing
  • Motor body 
  • Blending shaft 
  • Whisk attachment
  • Food processor
  • Beaker   
  • User manual

In addition to a blending wand, this blender also comes with a beaker, a whisk attachment, and a food processor to enhance its versatility.

The Chefman Cordless Immersion Blender In the Box
  • Motor body 
  • Blending shaft 
  • Blade guard
  • Blade edge guard
  • Charger adapter & USB cord 
  • User manual

Beyonds the two main components, the Chefman also comes with a pot & pan guard to prevent scratches on your cookware and a blade guard so you can cover the blade entirely while your blender is not in use.

Dimensions

The KOIOS 4-in-1 Immersion Blender Length
  • Height:
    15.3" (38.9 cm)
  • Width:
    2.1" (5.3 cm)
  • Weight:
    3.4 oz (96 g)
  • Shaft Length:
    7.9" (20.1 cm)

Like all the light-duty immersion blenders we tested, the KOIOS 4-in-1 is well balanced. It is compact, portable, and has a long blending shaft that can be immersed in even a deep pot.

The Chefman Cordless Immersion Blender Dimensions
  • Height:
    16.4" (41.7 cm)
  • Width:
    2.3" (5.8 cm)
  • Weight:
    1.4 oz (40 g)
  • Shaft Length:
    8.2" (20.8 cm)

This Chefman is the right size to fit comfortably in your palm. At 1.4 pounds, it is a bit on the light side, but so are most immersion blenders that are made of standard plastic.

7.5

Build Quality

8.0
KOIOS 4-In-1 Immersion Construction

Made of medium-quality plastic reinforced with brushed stainless steel, the KOIOS’ body feels relatively solid (but it doesn’t look as sleek as the higher-priced models). Unlike the BELLA 10-speed, it showed no scratches after our course of testing. So far, we haven’t noticed any damage on the exterior; our blender still looks shiny and brand new.

There is a special inner rotary core fixed in the blending shaft that’s different from most immersion blenders in this price range. Thanks to this add-on, the tools are easy to attach to the motor body. Not only that, but they also latch securely in place, unlike the Muller Ultra-Stick that occasionally let go of its whisk.

The Chefman Cordless Immersion Blender Build Quality

The Chefman provides a medium level of quality at a very reasonable price. With a black-clad exterior all around, the motor looks charming and notably elegant. After a course of testing, we found a smattering of tiny scratches around this part, but they’re not too noticeable unless you look closely.

10

Beaker

0.0
KOIOS 4-In-1 Immersion Beaker
  • Material:
    Plastic
  • Capacity:
    20 oz
  • Measurements:
    Yes
  • Weight:
    0.22 lb
  • Height:
    6.7 inches
  • Dishwasher Safe:
    Yes
  • Tamper Included:
    No

The KOIOS’ beaker has a small 20-oz capacity with measurements in both milliliters and fluid ounces. As a nice bonus, it sports a flared base to ensure stability.

  • Material:
    N/A
  • Capacity:
    N/A
  • Measurements:
    N/A
  • Weight:
    NaN oz (NaN g)
  • Height:
    N/A
  • Dishwasher Safe:
    N/A
  • Tamper Included:
    N/A

The set doesn’t include a blending beaker, but you can purchase this add-on from any retailer.

Speed and Controls

The KOIOS 4-in-1 Controls
The KOIOS 4-in-1 Speed and Controls
  • Control Type:
    Press-button & speed dial
  • Min Speed:
    11,500 RPM
  • Max Speed:
    14,480 RPM
  • Presets:
    No
  • Noise Level:
    90 dB
  • Digital Display:
    No
  • Pulse Mode:
    Yes

We often feel a bit awkward with blenders that control speed with top-mounted dials; it’s really challenging to move the blending wand, adjust its speed, and hold the beaker at the same time. With the KOIOS, however, that isn’t an issue.

Our 4-in-1 machine offers 12 speed options and a Turbo function. It’s all controlled using two buttons and a dial. While the front controls are extremely responsive, the dial lets us switch between various speed settings with ease and this is partly because the blender itself runs very smoothly.

In particular, throughout each of our tests, we noticed that its motor didn’t vibrate too violently. This helped reduce the overall impact on the beaker and kept it stable rather than constantly jumping around the countertop. In other words, we didn’t need to hold the beaker throughout the whole job, so it wasn’t a problem to dial in the speed with a spare hand.

However, if you find it hard to adjust the dial, you can always just hit the turbo mode. That sends the blender into its highest speed immediately.

The Chefman Cordless Immersion Blender Speed and Controls
The Chefman Cordless Immersion Blender Speed and Controls 1
The Chefman Cordless Immersion Blender Speed and Controls 2
The Chefman Cordless Immersion Blender Speed and Controls 3
  • Control Type:
    Press-button
  • Min Speed:
    10.500 RPM
  • Max Speed:
    14.333 RPM
  • Presets:
    No
  • Noise Level:
    72 dB
  • Digital Display:
    No
  • Pulse Mode:
    No

You control this blender’s multiple speeds by varying the pressure on the trigger switch in front. The harder you press, the faster the blade will spin. There is also the safety lock button on the device’s rear. Both buttons must be engaged before the motor will turn. Fortunately, both of them are very sensitive, so you won’t need much pressure to get the job done. 

Your Chefman doesn’t have a pulse function, but you can still chop food evenly by pressing and releasing the buttons in short intervals.

7.0

Blending Shaft

7.0
The KOIOS 4-in-1 Immersion Blender Blade
  • Material:
    Stainless steel
  • Type:
    Sharp Blade
  • Guard Material:
    Stainless steel
  • Blade Count:
    2
  • Removable:
    Yes
  • Dishwasher Safe:
    Yes

Made of standard stainless steel plated with titanium, the blade has two prongs: one is sharp and the other is dull. Its relatively fragile construction means it isn’t intended for tough ingredients like ice cubes or coffee beans, but it’s still tough enough to handle whole-food combinations.

Unlike most other blenders with lobed or angular guards, this one’s blade guard is shaped like a parabolic arch. This special design allows us to easily reach the blade’s backside for cleaning. The vaulted slope also doesn’t trap food the way others do, so we never had to stop and dislodge debris with a spoon.

The blade guard is also designed to reduce splattering, and it’s really up to the job. However, due to its metal construction and sharp edges, it left marks on the beaker even when we blended very carefully.

The Chefman Cordless Immersion Blender Blending Shaft
The Chefman Cordless Immersion Blender Blending Shaft 1
The Chefman Cordless Immersion Blender Blending Shaft 2
  • Material:
    Stainless steel
  • Type:
    Sharp blade
  • Guard Material:
    Stainless steel
  • Blade Count:
    2
  • Removable:
    No
  • Dishwasher Safe:
    Yes

The whole blending shaft is made of standard stainless steel, but after several uses, we nevertheless found a small rust spot on the blade guard. We’ve tested a myriad of immersion blenders and noticed that rust is rare. We can’t say for sure whether the rust will spread, but if it does, the machine’s integrity and appearance will be severely impaired. 

The level of craftsmanship of the blade guard is okay overall but it could stand some improvements. The holes in the guard, for instance, look non-uniform and slightly misshapen. 

The blade has two prongs: one is sharp and the other is dull. It’s sturdy enough to puree nearly all kinds of soft foods. It can even make quick work of emulsifying, so you can prepare mayonnaise or any other sauce that needs a creamy, stable base.

10

Power Cord

The KOIOS 4-in-1 Immersion Blender Cord
  • Cord Length:
    5.6 ft
  • Type:
    2-prong plug
  • Detachable:
    No

The power cord is long enough that you won’t feel constrained. It has a small loop that is meant to keep the blender organized.

Whisk Attachment

Extra Accessories

Not Included
The KOIOS 4-in-1 Immersion Blender Whisk Attachment
  • Material:
    Stainless steel
  • Dishwasher Safe:
    Yes
  • Removable:
    Yes

This whisk attachment is moderately good at certain tasks like beating egg whites, whipping cream, and making emulsified sauces. Compared with other low-priced hand blenders such as the BELLA 10-speed or the Hamilton, its polished stainless steel wires feel more sturdy and durable under consistent use.

  • Material:
    N/A
  • Dishwasher Safe:
    N/A
  • Removable:
    N/A

No extra blending attachments are included.

Food Processor

Extra Accessories

The KOIOS 4-in-1 Immersion Blender Food Processor
  • Material:
    Plastic and Stainless steel
  • Dishwasher Safe:
    Yes
  • Removable:
    Yes

We haven’t conducted tests on this attachment, but the stainless steel S-blade’s construction looks capable of chopping various foods just like any other low-grade food processor.

Usability

8.3
usability Scores
  • Ease of Use (60%)
    8.3/10
  • Blade Assembly (10%)
    8.5/10
  • Handling (20%)
    8.0/10
  • Cleanability (10%)
    8.5/10
8.8
usability Scores
  • Ease of Use (60%)
    8.8/10
  • Blade Assembly (10%)
    9.5/10
  • Handling (20%)
    9.0/10
  • Cleanability (10%)
    8.0/10
8.3

Ease of Use

8.8

This KOIOS is easier to use than many other blenders not only because of its simple design but also because its buttons are very responsive. The motor’s minimal vibration contributes to the overall usability scores as well. Since the machine itself runs very smoothly, we can maneuver the blender in comfort. It was a pleasant departure after the excessive vibration of some other blenders.

During our testing, we also found that this blender didn’t create suction — a main cause of splattering when you lift it upward for an even blend. As such, we didn’t experience any trouble when speeding up or moving the blending wand, even at the highest speed setting.

Maneuvering the Chefman is particularly easy and usually doesn’t splatter ingredients around. With the exception of the almond milk test, we didn’t have much trouble with our blending motions; this blender suctioned itself only lightly to the beaker’s bottom. 

Most of our testers also praised its pressure-sensitive speed controller, though a few got frustrated trying to switch between mid-range speeds. Either way, it does take some time to get a feel for the speed controls. 

The removable plastic guard covers the metal blade housing to minimize scratches on your pots and pans. With it in place, you can be less timid with your motions.

8.5

Blade Assembly

9.5
The KOIOS Blade Assembly

This blender comes with accessory ejection buttons on the motor body — a handy add-on giving you more control over the blade detachment process. Just a quick press of these clicky buttons pushes the attachment off of the motor body.

Putting them back is easy as well. Simply align the shaft with the main housing and push until they click and lock into place. There is one thing we really like about this blender’s blade assembly, though: Unlike others, the KOIOS attachments do not need to be rotated to a specific alignment to lock into place.

The shaft-release button not only helps reinforce the connection between the motor housing and the blending wand, but it also allows for easier disassembly. Simply press this button and pull the blending wand to separate the two parts. Setting up the blender is straightforward as well; align the motor body housing with the blending shaft and push them together until you hear them click.

8.0

Handling

9.0
The KOIOS Non-Slip Handle

The handle was comfortable to grip in all of the tests. Together with the machine’s minimal weight, its ergonomic design helps stave off hand fatigue, even through long bouts of vigorous blending. It also helped us maintain a grip even when the surface was wet or covered in grease.

Our Chefman let us blend in comfort thanks to the ergonomically designed handle. It didn’t get slippery even when our hands were oily during the mayonnaise test. The stable grip it provides is meaningful, especially if your hands fatigue quickly.

8.5

Cleanability

8.0

We found the easiest and most effective way to clean the blending wand or any blending attachment was by scrubbing it under running tap water. More often than not, food tailings could be quickly removed, even when they accumulated in the blade’s backsides.

All removable parts are top-rack dishwasher safe, but we prefer to clean them by hand since it’s faster and practically effortless. Following each test, we scrubbed away the food tailings with a soapy sponge. Most of the residue rinsed off easily, including the bits stuffed up behind the blades.