Viomi S9 vs Roborock S7+: An In-depth Comparative Review

Every home deserves a robot vacuum cleaner that offers a hassle-free and convenient cleaning experience.

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With the advancement in technology and busier lifestyles, robot vacuum cleaners have become a fundamental aspect of modern household management.

Today, we are putting two top contenders to the test – the Viomi S9 vs Roborock S7+.

In this blog, we will compare the features, pros and cons, and more, to help you decide which robot vacuum suits your needs the best 🙂

Viomi S9 vs Roborock S7+: Which is the Better Choice?

For those who want to cut to the chase, the Viomi S9 and Roborock S7+ both offer compelling features.

But when it comes down to the wire, the Viomi S9 stands out with its longer battery life, stronger suction, and larger dust bag capacity.

Here are all the pros and cons of these two fantastic robot vacuums:

Absolutely, I’ve split the information into two tables below:


1360° All-round Scanning & Mapping with LDS 2.0 LiDAR navigation system.Slightly lower suction power compared to some other models.
23-in-1 Vacuum, Sweep, and Mop technology.May have trouble navigating some complex home layouts.
3Ultra-strong 2700Pa suction power.Not specifically mentioned if it can handle multiple floor types like the Roborock S7+.
4Up to 60 days of hands-free cleaning with a 3L dust bag.It has a slightly heavier weight (18 pounds).
5Compatible with Alexa and Google Assistant for voice control.
6Smart app allows scheduling, map editing, and remote monitoring.
71-year warranty.
8Bumper Bar Sensor with 25 sets of sensors for precision mapping.
9Obstacle sensor to avoid getting stuck under low furniture.
10Capable of overcoming up to 15mm obstacles.
11Cliff sensor to avoid falls.
12Auto-Charging with 5200mAh battery.
13Multi-floor Mapping with up to 5 home floor plans stored.

Roborock S7+

1Self-Empty Dock Support with up to 120 days of cleaning without emptying.Sonic mopping may not be as efficient on certain stains.
2Sonic Vibration Technology for efficient mopping.The Roborock S7+ is quite heavy, at 28 pounds.
3Auto-Lifting mop when detecting carpet.It has a shorter runtime of 180 minutes compared to the Viomi S9.
4Ultrasonic Carpet Detection for optimal carpet handling.Slightly lower suction power (2500Pa) compared to Viomi S9.
5Multi-Layer Air Filtration system to keep dirt inside the dock.Carpet recognition may not work perfectly on all types of carpets.
6LiDAR Navigation with Adaptive Route Algorithms for precise mapping.Does not mention obstacle avoidance features like Viomi S9.
7Intense 2500Pa suction power.Multi-Layer Air Filtration system might require more maintenance.
8600g Mop Pressure for effective mopping.
9Multi-Directional Floating Brush for closer floor cleaning on uneven surfaces.
10Intelligent Mop Lifting when carpet is detected.
11Auto-Empty Dock Support after cleanup.
12Compatible with Alexa and Google Home for voice control.

However, let’s delve deeper to understand why.

Overview of Viomi S9

Viomi S9 is like a smart ninja.

Its 360° scanning and mapping system helps it avoid bumping into things and covers every nook and cranny of your house.

It vacuums, sweeps, and mops, all in one go – just like a multitasking superhero!

With a super suction power of 2700Pa and a battery that works for up to 250 minutes, it sucks up all the crumbs and hair effortlessly, leaving your carpets and floors sparkling clean.

The S9 can also hold up to 60 days of dirt in its self-emptying dust bag.

So, you can relax and let it do its thing for months without needing to empty the dust bag.

And did we mention it can obey your voice commands?

Just ask your Alexa or Google Assistant to get the S9 to clean, and voila!

It’s as easy as asking for a bedtime story!

Overview of Roborock S7+

The Roborock S7+ is no less impressive.

It also has a self-emptying dock and a battery life that lasts up to 180 minutes.

But what sets it apart is its sonic mopping technology that scrubs your floors up to 3000 times per minute.

Imagine having a mini army of cleaners scrubbing your floors to perfection – that’s the S7+ for you!

This clever little robot can also detect carpets and lift its mop to avoid making them wet.

And if it stumbles upon a stubborn stain, it boosts its suction power for a deeper clean.

Plus, its ultrasonic carpet detection feature is great for homes with different types of flooring.

Viomi S9 vs Roborock S7+: Detailed Comparison


The Viomi S9 has a sleek and modern design and has a larger dustbin capacity than the Roborock S7+, perfect for large homes.

The S7+, on the other hand, is sturdy and well-built, and its interface is more intuitive, making it easier to control and program.

Cleaning Capabilities

Both the Viomi S9 and the Roborock S7+ have impressive suction power, capable of picking up stubborn dirt and debris.

Their brush designs are effective at sweeping and gathering dust, but the Roborock S7+ leads with its sonic mopping feature.

Both models support multi-floor mapping, but the S7+ delivers a more precise and efficient mapping system.

The S9, with its stronger suction and 3-in-1 technology, works exceptionally well on all surfaces.

Meanwhile, the S7+ stands out with its sonic mopping technology, which scrubs your floors like a professional cleaner.

Battery Life and Charging

The S9 wins here with its 250-minute runtime, compared to the S7+’s 180 minutes.

However, both robots are smart enough to return to their charging docks when the battery is low and then resume cleaning after they’re charged.

Connectivity and Smart Features

Both models are Alexa and Google Assistant compatible, making it easy to control them using voice commands.

They also offer app control, allowing you to schedule cleanings and monitor cleaning status from your smartphone.

Maintenance and Reliability

While both models are reliable and built to last, the S9’s larger dust bin capacity and self-emptying feature make it more convenient for users who prefer low-maintenance devices.

Warranty and Customer Service

The Viomi S9 comes with a standard one-year warranty covering manufacturer defects.

Customer service has received mixed reviews, but overall seems reliable and responsive.

The Roborock S7+ also offers a one-year warranty.

Their customer service is widely praised for being responsive and helpful.


As you can see, both the Viomi S9 and Roborock S7+ are packed with features that can transform your cleaning routine.

They’re like the superheroes of the cleaning world, ready to take on any dirt or dust that comes their way.

While the S9 might edge out the S7+ in terms of battery life and suction power, the S7+ impresses with its innovative mopping technology.

At the end of the day, the best robot vacuum for you depends on your personal needs and preferences.

Enjoy your new robot vacuum, whichever one you decide to purchase 🙂


  • Kevin L. Morris

    Hey there, I’m Kevin, from Colorado! I have been passionate about repairing appliances and electronics for the past 18 years. Modern vacuum cleaners break or malfunction way too often, so I have decided to contribute to and help my online readers with anything related to vacuums repair. I can’t wait to help you get your vacuum cleaner working again!

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