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Robovations
Robovations™
Robot Autonomy, Classified
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Comparison · 2 robots

Eureka J15 Ultra · Kyvol Cybovac S31 Smart Laser Robot Vacuum

All robot vacuums. Every measure below is plotted against the full class, so a difference can be read against how much the class itself varies.

  1. Eureka J15 Ultra
  2. Kyvol Cybovac S31 Smart Laser Robot Vacuum

Up to three

01 Classification

What each one does on its own.

The Autonomy Ladder is the same five rungs for every robot on the site. A rung describes the conditions a robot handles without you, not how good it is.

V
Generalized
Any task, any setting
IV
Environmental
Handles new obstacles without help
III
Conditional
Finishes familiar jobs on its own
Eureka J15 UltraKyvol Cybovac S31 Smart Laser Robot Vacuum
II
Assisted
Runs preset routines, needs rescue
I
Manual
One action, on command
02 Assessment

Where they actually differ.

The Robovations Score is nine inputs across three pillars, each weighted as shown and each scored so that more is better. A robot can lead on one and trail on another, which is the point of showing them apart. Cost of ownership and data handling are reported on each robot's own page and are never averaged into the score.

Capability

Task completion16% of score
Does it finish the job it is sold to do, unattended
  • Eureka J15 Ultra78
  • Kyvol Cybovac S31 Smart Laser Robot Vacuum82
18median 72 across 381 scored robots100
Coverage and navigation10% of score
Does it work the whole area, and hold that between runs
  • Eureka J15 Ultra100
  • Kyvol Cybovac S31 Smart Laser Robot Vacuum55
15median 70 across 371 scored robots100
Edge-case recovery10% of score
Does it recover from the failures its category presents
  • Eureka J15 Ultra62
  • Kyvol Cybovac S31 Smart Laser Robot Vacuum25
18median 50 across 287 scored robots100
Operating envelope4% of score
How far conditions can vary before performance drops
  • Eureka J15 Ultra84
  • Kyvol Cybovac S31 Smart Laser Robot Vacuum25
25median 68 across 345 scored robots100

Dependability

Field failure rate16% of score
Documented hardware failures per owner-year
  • Eureka J15 Ultra29
  • Kyvol Cybovac S31 Smart Laser Robot Vacuum40
6median 70 across 371 scored robots100
Software stability14% of score
Whether updates fix more than they break
  • Eureka J15 Ultra65
  • Kyvol Cybovac S31 Smart Laser Robot Vacuum53
15median 65 across 300 scored robots100
Support longevity10% of score
Committed parts, service and updates, with dates
  • Eureka J15 Ultra73
  • Kyvol Cybovac S31 Smart Laser Robot Vacuum25
0median 63 across 377 scored robots100

Ownership burden

Routine maintenance12% of score
Hands-on time it asks for in normal operation
  • Eureka J15 Ultra87
  • Kyvol Cybovac S31 Smart Laser Robot Vacuum55
22median 65 across 382 scored robots100
Consumables8% of score
Parts that must be bought to keep it working
  • Eureka J15 Ultra61
  • Kyvol Cybovac S31 Smart Laser Robot Vacuum45
8median 69 across 381 scored robots100
03 Measured against the class

How far apart is a long way?

A number only means something next to the spread it sits in. Each track below is the real range across every classified robot in the class, with the median marked.

Price195 with a published figure
  • Eureka J15 Ultra$699
  • Kyvol Cybovac S31 Smart Laser Robot Vacuum$519
$160median $799.99$2,599
Suction (mode not stated)172 with a published figure
  • Eureka J15 Ultra19,000 Pa
  • Kyvol Cybovac S31 Smart Laser Robot Vacuum3,000 Pa
1,000 Pamedian 8,000 Pa36,000 Pa

Not compared, because fewer than two of these robots carry a published figure: Runtime, Charge time, Noise, Weight, Height.

04 Ownership

What the numbers leave out.

The trade-off

What each design gives up to be good at what it is good at.

Eureka J15 Ultra

Mopping adds capability but requires weekly mop-pad maintenance; one feature trades hands-off claims for consumable churn.

IntelliView pairs LiDAR with an RGB camera, an LED lamp and a line laser to recognize objects, so the obstacle avoidance runs on a camera operating inside the home. The recognition that keeps the robot off cables and pet waste is the same hardware a privacy-sensitive household has to accept.

Kyvol Cybovac S31 Smart Laser Robot Vacuum

A self-emptying base reduces dust-bin handling to roughly every 60 days, but the mop still relies on a manually filled and emptied external water tank rather than a self-washing station.

The original design and price point were competitive for its class, but that original value is now weighed against a sold-out official US store and signs of a neglected product catalog.

Who each one is wrong for

Stated by the record itself. A robot being wrong for a household is a fact about fit, not a fault.

Eureka J15 Ultra
Homes with primarily high-pile or deep carpet
Mopping mechanism targets hard floors. Owner reports for Eureka mop-combos note reduced effectiveness on textured carpet; dedicated vacuums outperform here.
Owners with spotty 2.4GHz-only Wi-Fi coverage
Eureka J-series use 2.4GHz Wi-Fi exclusively. Homes with 5GHz-only networks or fragmented coverage require mesh upgrades or Wi-Fi extenders.
Users requiring true Level IV autonomous operation
Classification at Level III: operates in a mapped environment with occasional human intervention for edge cases. IntelliView recognizes and routes around known object types, but the robot does not adapt to settings outside the map it has been taught.
Kyvol Cybovac S31 Smart Laser Robot Vacuum
Buyers wanting a currently purchasable new unit
As of this research, every model on Kyvol's official US store, including the S31, is listed as sold out.
Buyers who need confidence in ongoing parts or software support
The wider Kyvol catalog shows broken product pages and pricing inconsistencies consistent with reduced vendor upkeep.
Buyers wanting a self-washing mop system
The S31 mops from a manually filled external water tank rather than a self-cleaning pad station.

What stays your job

The upkeep ownership hands back to you, whatever the autonomy level says.

Eureka J15 Ultra
  • Weekly: Rinse the mop pads by hand or run a dock wash cycle; check the side brush and FlexiRazor roller for hair wrap.
  • Monthly: Clean the dust filter, rinse the station tray, and refresh the 4 L clean and 3.4 L dirty water tanks.
  • Every 3-6 months: Replace the 3 L dust bag; Eureka rates one at roughly 75 days, the early edge of this window.
  • Every 3-6 months: Replace the mop pads once the surface mats or frays; descale the station’s water circuit with an appliance descaler, not vinegar, if mineral buildup appears.
  • Annually: Replace the FlexiRazor roller brush and the filter; replacement runs 6-12 months depending on hair load, and the anti-tangle roller is built to stretch that cycle.
  • Annually: Inspect the dock gaskets and charging contacts for wear.
Kyvol Cybovac S31 Smart Laser Robot Vacuum
  • After every use: Empty, rinse, and air-dry the external mop water tank and remove the cloth after mopping runs; the S31 has no self-washing pad system.
  • Weekly: Cut wrapped hair from the main brush and side brush and wipe the LDS laser turret and cliff sensors.
  • Monthly: Check the base station’s dust bag; Kyvol rates the base for up to 60 days of debris, so expect a change roughly every two months.
  • As needed: Replace the filter, brushes, and mop cloths when worn; Kyvol publishes no replacement intervals for the S31.
  • As needed: Stock spare bags and filters while aftermarket listings last; Kyvol’s US store lists every model sold out, and third-party channels show refurbished units and parts rather than new stock.
  • As needed: Update no-go zones and cleaning schedules in the Kyvol app.
05 Evidence

How much each of these is standing on.

Classifications rest on different depths of evidence. A pre-release assessment and a verified one are not the same kind of claim.

Evidence behind each classification
Robot Evidence status Sources reviewed Last assessed
Eureka J15 Ultra Verified 5 Aug 2026
Kyvol Cybovac S31 Smart Laser Robot Vacuum Discontinued 2 Aug 2026

Robovations classifies robots; it does not rank them. Nothing on this page is a recommendation, and no manufacturer influences a classification or its placement here.