Eufy Stair Climbing Vacuum Review: MarsWalker Cleans Floor?

Do you carry your robot vacuum up the stairs every week? Many people in two story homes do the same thing. They buy a smart robot and still end up lifting it by hand.

Eufy says it has fixed this problem. Its MarsWalker is a stair climbing carrier that moves a robot vacuum from one floor to the next. In this review, you will learn how it works, what it costs, where it falls short, and which options you can buy right now.

In a Nutshell

• The MarsWalker is a carrier, not a vacuum. It works like a small stairlift for your robot. The robot drives inside the shell, and the MarsWalker climbs or goes down the stairs. It does not clean the stairs.
• The Eufy Omni S2 is its main partner. The S2 has 30,000Pa of suction, a roller mop, and a self emptying dock. Independent tests show it cleans carpet very well and avoids obstacles almost perfectly.
• It can handle straight, L shaped, and U shaped stairs. Four arms that move on their own and a track drive system grip each step. The MarsWalker builds a 3D map of your home, so it knows when to move the robot.
• Release timing is still uncertain. Eufy first showed the MarsWalker at IFA 2025 and planned to launch it in spring 2026. In late May 2026, buyers on the Eufy forum were still asking when it would ship. Check Eufy’s official store for the latest status.
• Price is the biggest question. The Omni S2 alone costs $1,599.99. Eufy has not shared a price for the MarsWalker yet. The full setup will likely cost a lot of money.
• Good alternatives exist today. The Dreame X50 Ultra, Roborock Saros Z70, and Eufy Omni S1 Pro are all available now. None of them climbs stairs, but each one is strong in its own way.

What Is the Eufy MarsWalker Stair Climbing Vacuum?

The MarsWalker is a stair climbing platform from Eufy, the smart home brand owned by Anker. Eufy showed it for the first time at IFA 2025 in Berlin. Android Headlines named it one of the best products of that show.

A lot of people call it a “stair climbing vacuum,” but that name is a bit off. The MarsWalker does not have a brush or suction motor. It is a carrier that moves a robot vacuum between floors.

Here is the simple idea behind it. Your robot cleans the ground floor first. Then it drives into the MarsWalker, and the MarsWalker carries it up the stairs to the next floor.

When the robot reaches the top, it drives out and starts cleaning again. After the job is done, it can go back to its base station to empty the bin, wash the mop, or recharge. The MarsWalker has its own charging dock too.

The design looks like a small Mars rover. It has big rugged wheels, a track system, and an open space in the middle where the vacuum sits. That is how it got its name.

Robot vacuums have had one big weakness for years. Even the best models can only cross bumps of two or three inches. Stairs stop every one of them. The MarsWalker is the first serious attempt from a major brand to fix this.

Eufy Omni S2 With MarsWalker

Last update on 2026-07-17 / Affiliate links / Images from Amazon Product Advertising API

The MarsWalker needs a partner robot, and the Eufy Omni S2 is the first model Eufy has confirmed for it. The S2 is Eufy’s flagship robot vacuum and mop. It went on sale in the US in late March 2026 after a short delay.

The S2 has 30,000Pa of suction, which equals about 100 air watts. It uses a split brush called DuoSpiral that stops hair from wrapping around the roller. It also has an extra side brush that reaches out into corners.

For mopping, the S2 uses the HyperStream 2.0 roller mop. The roller spins at 240 RPM and presses down with 15 newtons of force. It gets fresh water all the time, and dirty water goes into a separate tank on the robot.

The robot can also lift its mop when it finds carpet. That keeps your rugs dry. Eufy says the chassis can rise to handle carpets up to 5 cm thick.

One fun extra is the built in fragrance system. The S2 can release scents like citrus, basil, bergamot, and lychee while it cleans. Your home can smell fresh after every run.

The S2 can cross single thresholds up to 3.5 cm and double thresholds up to 4.2 cm. Eufy also says it can recognize more than 200 objects and more than 40 types of dirt. On its own, though, the S2 cannot climb stairs. That job belongs to the MarsWalker.

How the MarsWalker Climbs Stairs

The climbing process is the most exciting part of this product. Reporters from PCMag and The Verge watched live demos at IFA. Their notes help us see exactly how it works.

First, the MarsWalker opens its front doors. The Omni S2 drives into the center space. Then the doors close to hold the robot in place.

Next, the MarsWalker starts to climb. Its big wheels and track drive system do most of the work. Four arms, which Eufy says move on their own, help it grip each step.

During the climb, the MarsWalker pushes out bracers from all four corners. These bracers look a bit like antennas. They add extra safety and help stop the unit from tipping over.

At the top or bottom, the MarsWalker pulls the bracers back in. It opens its doors, and the S2 drives out to clean. The MarsWalker then waits for the trip back.

Eufy says the MarsWalker can handle straight, L shaped, and U shaped stairs. It builds a 3D map of your full home. It can tell when the robot has finished a floor and then move it without your help.

There is one key limit. The MarsWalker does not clean the stairs while it climbs. You still need a handheld vacuum for the steps. Eufy’s own UK blog says this clearly as well.

Top 3 Alternative for Eufy MarsWalker

Because the MarsWalker’s launch is still uncertain, you might want a robot you can buy today. These three models are strong choices. None of them climbs stairs, but each one works great on a single floor or with multi floor maps.

Dreame X50 Ultra

Last update on 2026-06-09 / Affiliate links / Images from Amazon Product Advertising API

The Dreame X50 Ultra is famous for its obstacle crossing. It can climb over bumps up to 6 cm, or 2.36 inches. It has 20,000Pa of suction and a detangling brush for hair. It is a great pick for homes with tall thresholds and lots of rugs.

Roborock Saros Z70

Last update on 2026-07-01 / Affiliate links / Images from Amazon Product Advertising API

The Saros Z70 is the first mass produced robot vacuum with a folding mechanical arm. Roborock calls it OmniGrip. The arm can pick up socks and small items before the robot cleans. Its price has dropped a lot since launch, so look for deals.

Eufy Omni S1 Pro

Last update on 2026-10-01 / Affiliate links / Images from Amazon Product Advertising API

The Omni S1 Pro is the older sibling of the S2. It is a mopping champion on hard floors. In Vacuum Wars tests, it scored 136 on dried stains, while the S2 scored 82. If your home has mostly tile or wood, this model may suit you better.

Cleaning Performance of the Omni S2 Partner

The MarsWalker only moves the robot, so the S2 does all the actual cleaning. Vacuum Wars bought the S2 on its own and tested it in their studio. Their results give us a clear picture.

On carpet, the S2 did very well. It removed 87% of embedded sand from medium pile carpet. The older S1 only removed 61%, and the studio average was 78%.

Pet hair results were strong too. The S2 picked up 88.5% of flattened pet hair from carpet. That beats the studio average of 82.2%.

The DuoSpiral brush earned a perfect score in the hair tangle test. Testers used 7 inch hair strands, and nothing wrapped around the brush. The S1 had a 26% wrap rate in the same test.

Mopping is the weaker side. The S2 scored only 82 points on dried stains, while the studio average was 108. Testers think the low water output causes this. The S2 used just 0.35 grams of water compared to the average of 1.07 grams.

On hard floors, the side brushes sometimes scattered fine dust on the first pass. The robot picked it up on the second pass. Overall, the S2 is a carpet and pet hair expert with average mopping skills.

Smart Mapping and Obstacle Avoidance

Good mapping matters even more with the MarsWalker. The robot needs to know each floor, the stairs, and the docks. Eufy built its system for this job.

The S2 uses 3D MatrixEye 2.0. It combines a 3D Time of Flight sensor, a front RGB camera, and LED lights for dark rooms. Eufy says the MarsWalker shares the same 3D mapping and AI features.

In obstacle tests, the S2 was nearly flawless. Vacuum Wars placed 24 objects in its path, including a hard “torture test” setup. The S2 avoided all 24 objects. The studio average was only 16.

Only one other robot in their testing history got a perfect score. That was the Roborock Saros 10R. This puts the S2 in very elite company.

The Eufy app makes control easy. You can draw virtual walls, set no go zones, and choose settings for each room. The app has a 4.4 rating on Android and 4.7 on iOS.

The S2 also works with major voice assistants and supports Matter. One small downside is that you cannot watch a live video feed from the camera. Some other brands offer this feature, so keep it in mind if you want to check on pets.

The UniClean Station and Daily Upkeep

A robot is only as good as its dock. The S2 comes with the UniClean station, which does most of the dirty work for you. This makes the whole MarsWalker system feel more hands free.

The station has a tall, slim design. It takes up less floor space than many docks. The water tanks also sit higher, so you do not need to bend down as much.

After each run, the dock washes the mop roller with 140°F hot water. Then it dries the roller with 131°F hot air. This helps stop bad smells and germ growth.

The dock also makes electrolyzed water to clean floors and parts. It adds detergent on its own. You just refill the detergent once in a while.

The dust bag holds 2.5 liters. Eufy says it can store up to 68 days of debris. The robot’s own bin holds 330 ml before the dock empties it.

The dock has an LCD touchscreen that shows the status. It also fast charges the robot between jobs. With the MarsWalker, the robot can go back to this dock from any floor to empty, wash, and charge. That is the real promise of whole home cleaning.

Battery Life and Coverage

Battery life matters a lot in a multi floor home. The robot has to clean more space and also ride up and down the stairs. Here is what we know.

Eufy lists the S2’s battery life at 180 minutes. That sounds great on paper. Real world tests tell a slightly different story.

Vacuum Wars measured the S2’s navigation speed at 0.64 square meters per minute. The studio average was 0.71. The older S1 moved faster at 0.83.

Based on that speed and battery drain, testers estimated the S2 can cover about 1,088 square feet per charge. That is a little under the studio average of 1,170 square feet. The S1 managed about 1,572 square feet.

For most homes, this is not a big problem. The S2 can recharge and then continue cleaning where it stopped. Fast charging at the dock also helps.

In a large two or three story home, though, the robot may need several charging breaks. The MarsWalker has its own 3D map and charging base. So the carrier itself should stay ready for the next trip. Plan for longer total cleaning times in a big multi level home.

Threshold Climbing and Real World Limits

The MarsWalker handles stairs, but the S2 still needs to cross door bars and rug edges by itself. This is where some homes may run into trouble. Let’s look at the facts.

Eufy rates the S2 for 3.5 cm single thresholds and 4.2 cm double thresholds. Those numbers are strong for a robot vacuum. In testing, the results were mixed.

Vacuum Wars tried a 32 mm single threshold three times. The S2 made it over only once. That is below Eufy’s claim.

If your home has deep sliding door tracks or tall room dividers, the S2 may get stuck at times. The Dreame X50 Ultra is better at this job. It can cross bumps up to 6 cm.

The MarsWalker has its own questions too. Eufy has not shared how much space it needs at the top and bottom of the stairs. Narrow landings, stair gates, and tight turns could cause issues.

Forum users asked about old Victorian stairs, 90 degree turns, and odd steps on landings. Eufy has not answered all of these yet. Measure your stairs and landings before you buy. Also keep the stair edges clear of shoes, toys, and cables.

Price, Release Date, and Availability

This is the part most readers care about. Sadly, it is also the least clear part. Here is what the reports show so far.

Eufy first showed the MarsWalker in September 2025. The Verge, CNET, and Vacuum Wars all reported a planned launch in spring or the first half of 2026. Eufy did not share a price.

The Omni S2 had its own delay. It was due in January 2026 but launched in late March 2026. It costs $1,599.99, and Vacuum Wars has seen it on sale for $1,399.99.

The MarsWalker seemed to slip as well. On May 29, 2026, an S2 owner posted on the Eufy forum. He said he bought the S2 just for the MarsWalker and it still was not out.

So what does this mean for you? Check Eufy’s official store and Amazon before you buy anything. The release status may have changed since these reports.

On price, many Reddit users expect the MarsWalker to cost a lot. Some think a bundle with the S2 will be the best deal. Until Eufy shares real numbers, do not count on a low price. A second robot for your upstairs might cost less.

Pros and Cons

Every product has strengths and weak spots. Here is a clear look at both sides of the MarsWalker and Omni S2 setup. This list mixes Eufy’s claims with independent test results.

Pros

• True floor to floor movement. The MarsWalker carries the robot up and down stairs, so you do not need to lift it.
• Works with many stair types. Eufy says it handles straight, L shaped, and U shaped stairs.
• Excellent carpet cleaning. The S2 removed 87% of embedded sand in independent tests.
• Zero hair tangles. The DuoSpiral brush earned a perfect score with 7 inch hair.
• Near perfect obstacle avoidance. The S2 avoided all 24 test objects.
• Hands free dock. The UniClean station washes, dries, empties, and refills on its own.
• Saves money on a second robot. One robot can clean every floor in theory.

Cons

• Does not clean the stairs. You still need a handheld vacuum for each step.
• Uncertain release. The launch has slipped past the original spring 2026 target.
• No price yet. The full setup will likely cost a lot.
• Weaker mopping. The S2 scored below average on dried stains.
• Mixed threshold results. The S2 struggled with a 32 mm bump in testing.
• No live camera view. You cannot watch a video feed in the app.

Who Should Buy the Eufy Stair Climbing Vacuum?

The MarsWalker is not for everyone. It fits some homes perfectly and others not at all. Here is how to decide.

Buy it if you live in a two or three story home. This is the main reason the product exists. If you hate carrying your robot up the stairs, the MarsWalker solves that pain.

Buy it if you have carpets and pets. The S2 shines on carpet and pet hair. Its brush does not tangle, and it avoids pet messes and toys well.

Buy it if you love new tech. The MarsWalker is the first product of its kind from a major brand. Early fans will enjoy being first.

Skip it if your home has one floor. You do not need a stair carrier. The S2 alone or the S1 Pro will serve you well.

Skip it if you mainly need mopping. The S1 Pro scrubs dried stains much better than the S2. Hard floor homes should look there first.

Skip it if you are on a budget. A second cheaper robot for upstairs may cost less than the MarsWalker. It will also clean faster, since two robots can work at the same time.

Also think about your stairs. Very narrow stairs, tight landings, or stair gates may not work with the MarsWalker. Measure them before you buy.

Final Verdict

The Eufy MarsWalker is one of the most exciting ideas in robot vacuums in years. It goes after the biggest problem in multi level homes. Stairs have stopped robot vacuums since day one, and Eufy wants to change that.

The demos look promising. The four arms, track drive, and corner bracers give it a stable climb. The 3D map and auto return to the dock make the system feel truly hands free.

The Omni S2 is also a strong partner robot. Independent tests show excellent carpet cleaning, zero hair tangles, and near perfect obstacle avoidance. Its mopping and threshold climbing are the weak spots.

Still, we have to be honest with you. As of the latest reports, the MarsWalker had not launched on time. Eufy has not shared a price. You cannot judge value without a price tag.

Our advice is simple. If you need a robot now, buy the one that fits your floors today. The S2 is a great choice if you want to be ready for the MarsWalker later.

If you can wait, keep an eye on Eufy’s store and real owner reviews. Once people use the MarsWalker on real stairs, we will know if it lives up to the hype. For now, it is a bold step in the right direction.

FAQs

Does the Eufy MarsWalker clean stairs?

No, it does not. The MarsWalker only carries a robot vacuum between floors. You still need a handheld vacuum or hose tool to clean each step.

Which robot vacuums work with the MarsWalker?

Eufy has confirmed the Omni S2 as the first compatible model. Eufy says more models will work with it, but it has not shared a full list. Owners of the S1 Pro and E28 have asked, so check Eufy’s official page before you buy.

How much does the Eufy MarsWalker cost?

Eufy has not announced a price yet. The Omni S2 alone costs $1,599.99. Many buyers expect the MarsWalker to add a large amount on top of that.

When will the MarsWalker be available?

Eufy planned a spring 2026 release. In late May 2026, owners on the Eufy forum said it was still not out. Check Eufy’s store or Amazon for the latest news.

What types of stairs can the MarsWalker climb?

Eufy says it can handle straight, L shaped, and U shaped stairs. It uses a 3D map to find the stairs on its own. Very narrow stairs or tight landings may still cause trouble.

Is it cheaper to buy a second robot instead?

Often, yes. A budget robot for your upstairs may cost less than the MarsWalker. Two robots can also clean at the same time, which saves time.

Can the Omni S2 cross door thresholds?

Eufy rates the S2 for 3.5 cm single thresholds and 4.2 cm double thresholds. In independent testing, it cleared a 32 mm bump only once in three tries. Homes with deep door tracks may see some issues.

Is the Omni S2 good for pet hair?

Yes, it is very good. It picked up 88.5% of pet hair from carpet in testing. Its DuoSpiral brush also showed zero hair tangles.