Robot vacuum with a mop roller at an attractive price: Ecovacs Deebot T90S Pro Omni review

The Ecovacs Deebot T90S Pro Omni is currently not available in the USA. In Europe, the recommended retail price is 799 euros. The robot vacuum and mop is available directly from Ecovacs as well as from various retailers such as Amazon. It is available in black and white, as well as in an Omni-Care version with more included accessories.

It has only been a little over six months since Ecovacs unveiled the Deebot T90 Pro Omni, an exciting mid-range robot vacuum that impressed in our review and gave some flagship models a real run for their money. Now its successor, the Ecovacs Deebot T90S Pro Omni, is already here. Our Ecovacs Deebot T90S Pro Omni review reveals the differences and what the manufacturer has improved further.

Before we get into our hands-on impressions, first a few general details about the features and improvements. A look at the device itself reveals only minimal changes. The Deebot T90S Pro Omni once again comes with a fairly compact station. The design remains simple and elegant, looking more stylish, in our opinion, than that of many other robot vacuums. However, dust quickly collects on the slightly rough surface.

A look at the data sheet above reveals that there are indeed a few changes compared to the Deebot T90 Pro Omni. Among other things, the manufacturer has increased suction power by 33 percent to 40,000 Pa with an airflow of 16.45 L/s. This promises even better dust pickup, which we will discuss further below. At the rear is once again the Ozmo Roller 3.0 - the current generation of Ecovacs' mop roller, which is also fitted in the current flagship Deebot X12S OmniCyclone (approx. €1,000 on Amazon). What is new is that the mop roller can not only be raised by up to 15 mm, but is also "shut away" by an extending cover when cleaning carpets.

We are already familiar with the PowerBoost instant charging feature from its predecessor. In just 3 minutes, the robot tops up its battery by 10 percent during brief maintenance stops at the station. Ecovacs' AI agent Yiko is also on board, now in its second generation. And in the station, which can once again dispense cleaning solution automatically, the mop roller is cleaned with even hotter water at temperatures of up to 100°C.

In recent years, we have had no problems setting up any of the Ecovacs robot vacuums we have tested. The Deebot T90S Pro Omni is no exception. The app and the robot's voice prompts (initially in English) provide helpful guidance through connecting the robot, setting up Wi-Fi and then mapping.

During mapping, the robot explores its new surroundings and creates a virtual map. Its initial room layout was not quite as accurate as we have seen with some other models in our tests. However, the extensive customization options let you correct this with just a few taps. Then simply fill the station with water, and the first floor cleaning can begin.

As before, Ecovacs uses Mini-ToF technology and AIVI 3D 4.0 at the front of the Deebot T90S Pro Omni, dispensing with the conventional laser turret. Nevertheless, navigation worked reliably and generally provided thorough coverage, although the robot occasionally turns on the spot to get its bearings, as it lacks a 360-degree view. The Deebot T90S Pro Omni was not quite as bold or proactive in approaching corners and tight spaces as other robot vacuums in our tests, often skipping them entirely.

With obstacle detection set to high sensitivity, the robot vacuum and mop did not appear particularly confident either. Ultimately, however, it successfully detected all test obstacles, including a 4-by-2-stud building brick and a loose shoelace, without touching them. Overall, it could have cleaned around smaller and larger obstacles a little less hesitantly and more confidently. Switching to standard sensitivity improved this to some extent in our test. However, the Deebot T90S Pro Omni then knocked the smallest test obstacle out of the way.

On the positive side, we found that the Deebot T90S Pro Omni now also checks for obstacles a little more carefully when returning to its charging station. This had long been a major weakness that led to occasional collisions.

The Deebot T90 Pro Omni already impressed us with its good cleaning performance in our test. Its successor is every bit as good - and goes a step further with 33 percent more suction power. This particularly benefits the robot vacuum on carpets, where it now extracts even more dirt from the fibers. The pile should not be too high, however, as this causes problems (as it does for many other robot vacuums), leaving more dirt behind between the fibers.

The Deebot T90S Pro Omni had no problems at all on smooth floors in our test. It achieved very good cleaning results on tiles and laminate, including with its 27 cm-wide mop roller. The robot removed everyday dirt very reliably and much more thoroughly than many other robot vacuums, without spreading it around. This is particularly beneficial for greasy stains - although unfortunately there is no mop-only mode. Like its predecessor, it independently detected a milk stain on a dark floor and only mopped it. The robot vacuum and mop also removed a slightly dried-on ketchup stain almost completely after two passes, which is an excellent result.

Overall, the Ecovacs Deebot T90S Pro Omni thoroughly impressed us with its mopping performance in our test, performing even better here than when vacuuming. Buyers still have to do without an extendable side brush, however. Although its two brush arms are very long, they do not deliver particularly good corner-cleaning results, just as with the predecessor. The mop roller, on the other hand, still mops right up to the edge, although it could sometimes extend a little more readily. An optional setting for this is available in the app.

The anti-hair-tangling system impressed us in our test, handling even long hair without any problems. The cleaning station also did a thorough job, cleaning not only the mop roller itself but also the wash tray well. This reduces maintenance, although the process could be a little quieter, particularly during drying. The robot vacuum itself was comparatively quiet in our test.

For comparability, we have all robot vacuums in our tests clean around 50 square meters in one session using the default settings. The Ecovacs Deebot T90S Pro Omni needed around 80 minutes for this. At the end, its battery level was 63 percent. Fast charging during the brief stops to clean the mopping unit also helps make this possible. During these three-minute stops, the battery gains 10 percent, extending runtime and allowing larger areas to be cleaned without long interruptions.