The latest and greatest way of keeping our floors clean without pushing a heavy upright around is by getting a robotic vacuum cleaner. With one of these disc-shaped, low-profile robots gliding across your floors, you can scratch off one of the most tedious, time-consuming chores on your to-do list.

iRobot Roomba 891 Robot Vacuum Review

Today, we’re going to take a look at the iRobot Roomba 891. Although it’s one of the company’s lesser-known models, it is still a better performer than most of what you’ll find on the internet by other manufacturers, especially considering its budget-friendly price tag. Let’s take a look at what the Roomba 891 is packing under its disc-shaped hood.

1,000-Pa Suction Power

The Roomba 891 is engineered with a wide-mouth intake that sucks in air and debris at 1,000 Pa. This isn’t the most extraordinary suction available, but it’s more than enough to remove embedded debris out of low-pile carpeting and dried crumbs off and in between floorboards.

High-Efficiency Filtration

It goes without saying, but the filter in a vacuum cleaner – robotic or otherwise – depends on the quality of its filter. The Roomba 891 is equipped with a high-efficiency filter that traps dust, crumbs, and debris as small as 10 microns in width. Though it’s not at the same level as True HEPA Filters, it’s still small sufficiently effective at trapping any visible specks of dust.

iRobot Roomba 891 Robot Vacuum

Smart Dirt Sensors

The Roomba 891 is built with Advanced Dirt Detect sensors. These sensors are constantly on the lookout for concentrated piles of dirt on your floors and carpeting. This is especially useful for high-traffic areas like hallways and living rooms. When the sensors detect abnormal amounts of dirt, the Roomba 891 will prioritize cleaning that spot over anything else.

Improved Edge-Cleaning Side Brushes

A common problem found in most budget-friendly robotic vacuum cleaners is their side brushes. More often than not, these robots will push dirt away from the robot and into hard-to-reach edges and corners. The Roomba 891 is different, thanks to its intelligently designed 27° side brushes that pull in dirt from sharp edges and into the robot’s wide intake.

iRobot Roomba 891

90-minute Runtime

The Roomba 891 is powered by a moderately sized 1,800-mAh rechargeable Li-Ion battery. A full charge can provide the 891 up to 90 minutes of continuous power before needing to refuel at its charging dock. This is enough time for the robot to vacuum just an area of about 2,000 square feet.

Best Bet for Pets

The 3-stage filtration system, wide intake, and dual multi-surface brushes make the Roomba 891 the perfect solution for pet owners. The 891’s tangle-free, easy-to-clean brushes will pick up any strand of fallen hair off your floors without a hiccup.

iRobot Roomba 891 Review

Always Stay Connected

To control the iRobot Roomba 891 from afar, all you need is to connect the robot to your home’s router and install the iRobot Home App on your smartphone. Through this app, users can configure cleaning schedules and receive real-time notifications on the robot’s current status (working or chilling). You can also command the robot to start its cleaning cycle or charge its battery using voice commands through Amazon Alexa or Google Assistant.

Roomba 891

iRobot Roomba 891 vs. eufy BoostIQ RoboVac 11S (Slim)

It’s pretty clear that the Roomba 891 is a neat, inexpensive robot, but how does it compare against other robotic vacuum cleaners on the market? In the following sections, we’re going to compare the Roomba 891 against other models, starting off with the eufy BoostIQ Robovac 11S.

iRobot Roomba 891 vs. eufy BoostIQ RoboVac 11S (Slim)

First of all, the 11S is better at vacuuming floors and carpets with its 1,300-Pa suction. This allows the robot to clean every surface that the Roomba 891 can with the addition of medium-pile carpets. Combine that with its four side brushes and it almost sweeps the 891 away.

The 11S uses a larger 2,600-mAh battery that provides anywhere between 50 and 100 minutes of cleaning depending on what suction mode (standard, BoostIQ for medium-pile carpeting, and max) is activated. When the 11S is low on power, it’ll head straight to its dock to recharge. However, the one feature that makes robotic vacs so convenient – resume – is absent in this eufy model.

However, the remote control that comes with the 11S gives you full control over the robot. Users can set up cleaning schedules, command the robot to recharge, and select between the available suction and cleaning modes with a touch of a button.

eufy BoostIQ RoboVac 11S (Slim)

Putting everything together, we guess that the eufy BoostIQ RoboVac 11S could be a nice robot to have. If you’re on the fence between getting the Roomba 891 or the eufy 11S, the only question you need to ask yourself is this: do I need to control the robot when I’m not at home? If so, then the Roomba 891 is for you.

iRobot Roomba 891 vs. iRobot Roomba 890

One question that people often ask about the Roomba 891 is how does it differ from the Roomba 890? Does the extra “1” have a significant meaning? Did it fix a glitch that existed in the 890? Reality is often disappointing as you’ll soon find out.

iRobot Roomba 891 vs. iRobot Roomba 890

Functionally, the Roomba 891 and 890 are identical. They come with the same features and are the same size. They’re both made for pet owners by effectively picking up fallen fur without tangling in the brushes. Performance-wise, they’re the same.

A minor difference between the two Roombas is their faceplates. The 891 has a slightly brighter tone than the 890. But in the grand scheme of things, a robot’s appearance is unimportant.

It’s worth noting that both the 891 and 890 are compatible with the Dual Mode Virtual Wall. The virtual wall sends signals to the robots when they come within a few inches of it, instructing the robot to tuck its tail and turn away.

Surprisingly, the 891 does not come with the virtual wall in its box, but the 890 does. If you get the 891, you’ll have to purchase the virtual wall separately, which is an important piece that stops the robot from pushing and knocking over pet bowls.

iRobot Roomba 890

Furthermore, the 890 comes with an extra filter that replaces the one already installed in the robot. After about 12 months of use, you’ll need to swap out the old, clogged-up filter with a fresh one in your 891 or 890. The 891 does not have an extra filter in its box.

If you’re thinking of getting the Roomba 891, do yourself a favor and get the 890 instead.

iRobot Roomba 891 vs. Ecovacs Deebot N79S

Ecovacs is another highly popular manufacturer of robotic vacuum cleaners and window cleaners as well. The Deebot N79S is another low-priced robot that could be considered a starter bot for first-time buyers.

iRobot Roomba 891 vs. Ecovacs Deebot N79S

As a starter bot, it’s not equipped with the latest features or best features. The N79S delivers up to 1,000 Pa of suction power, which is perfect for hard floors and low-pile carpets. Performance-wise, we don’t see a ton of difference between the Roomba 891 and this robot.

The battery that powers the N79S is a 2,600-mAh rechargeable Li-ion that provides up to 110 minutes on standard suction mode. On max power mode, it consumes roughly twice as much battery power, reducing its maximum runtime to roughly 40 minutes, which is pretty incredible. The robot will automatically recharge when it’s running out of battery, but it won’t resume its cleaning cycle afterwards.

Similar to the Roomba 891, the N79S can connect to your home’s router to receive commands via the ECOVACS HOME smartphone app. This app allows you to manage the robot’s cleaning schedules, cleaning and suction modes, and instruct it to recharge from anywhere in the world, provided that your phone is connected to the internet.

Ecovacs Deebot N79S

But unlike the Rooba 891, the N79S has its own remote control. If you lost your smartphone or left it charging in your room, you can use the included RC to do everything that the ECOVACS HOME app can do. The N79S is also compatible with Alexa and Google, so shouting orders from another room can get the robot to start/stop/recharge.

Overall, the Ecovacs Deebot N79S is a slightly better robotic vacuum cleaner than the iRobot Roomba 891. By “slightly,” we mean 10-additional-minutes-of-cleaning-time-and-a-remote-control.

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iRobot Roomba s9+ (9550) eufy BoostIQ RoboVac 11S MAX eufy BoostIQ RoboVac 11S (Slim) Roborock S5 Robotic Vacuum and Mop Ecovacs Deebot 500
iRobot Eufy Eufy Roborock Ecovacs
s9+ 11S MAX 11S (Slim) S5 500
Continuous 100 min 100 min 150 min 110 min
12.2 x 12.2 x 3.5 in 17.8 x 13.7 x 4.8 in 12.8 x 12.8 x 2.9 in 13.8 x 13.7 x 3.8 in 12.9 x 12.9 x 3.1 in
20 pounds 5.73 pounds 5.73 pounds 7 pounds 6.7 ounces