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Robovations™
Robot Autonomy, Classified
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Comparison · 2 robots

HUTT DDC55 · Mamibot iGLASSBOT W120-T

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

  1. HUTT DDC55
  2. Mamibot iGLASSBOT W120-T
HUTT

HUTT DDC55

Autonomy
IIAssisted Autonomy
Score
51/100 Limited
Readiness
Not assessed
Price
$279list

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
II
Assisted
Runs preset routines, needs rescue
HUTT DDC55Mamibot iGLASSBOT W120-T
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
  • HUTT DDC5570
  • Mamibot iGLASSBOT W120-T75
18median 72 across 381 scored robots100
Coverage and navigation10% of score
Does it work the whole area, and hold that between runs
  • HUTT DDC5555
  • Mamibot iGLASSBOT W120-T70
15median 70 across 371 scored robots100
Edge-case recovery10% of score
Does it recover from the failures its category presents
  • HUTT DDC5550
  • Mamibot iGLASSBOT W120-T55
18median 50 across 287 scored robots100
Operating envelope4% of score
How far conditions can vary before performance drops
  • HUTT DDC5575
  • Mamibot iGLASSBOT W120-T38
25median 68 across 345 scored robots100

Dependability

Field failure rate16% of score
Documented hardware failures per owner-year
  • HUTT DDC5564
  • Mamibot iGLASSBOT W120-T70
6median 70 across 371 scored robots100
Software stability14% of score
Whether updates fix more than they break
  • HUTT DDC5533
  • Mamibot iGLASSBOT W120-T33
15median 65 across 300 scored robots100
Support longevity10% of score
Committed parts, service and updates, with dates
  • HUTT DDC5532
  • Mamibot iGLASSBOT W120-T30
0median 63 across 377 scored robots100

Ownership burden

Routine maintenance12% of score
Hands-on time it asks for in normal operation
  • HUTT DDC5525
  • Mamibot iGLASSBOT W120-T25
22median 65 across 382 scored robots100
Consumables8% of score
Parts that must be bought to keep it working
  • HUTT DDC5569
  • Mamibot iGLASSBOT W120-T69
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.

Price18 with a published figure
  • HUTT DDC55$279
  • Mamibot iGLASSBOT W120-T$179
$150median $374$850
Adhesion (mode not stated)16 with a published figure
  • HUTT DDC553,800 Pa
  • Mamibot iGLASSBOT W120-T2,800 Pa
2,800 Pamedian 3,800 Pa8,000 Pa
Noise17 with a published figure
  • HUTT DDC5565 dB
  • Mamibot iGLASSBOT W120-T65 dB
63 dBmedian 68 dB75 dB
Weight17 with a published figure
  • HUTT DDC552.5 lbs
  • Mamibot iGLASSBOT W120-T3 lbs
1.3 lbsmedian 3 lbs4.8 lbs
Height18 with a published figure
  • HUTT DDC553.3 in
  • Mamibot iGLASSBOT W120-T3.9 in
2.2 inmedian 3.5 in9.4 in

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

04 Ownership

What the numbers leave out.

The trade-off

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

HUTT DDC55

Entry-level cost buys fundamentals rather than features: the DDC55 holds the glass with a suction range HUTT states as 2000 to 3800 Pa and cleans with twin rotating discs, but it is a corded, remote-controlled machine with no app, no schedule and no mapping, and each pane is started by hand.

Mamibot iGLASSBOT W120-T

Auto-path on uniform framed glass is reliable; suction on textured panes and the manual’s outright prohibition on frameless glass are the binding constraints, not cleaning quality.

Sub-$200 dual-pad scrubbing is accessible, but rope anchoring, hand-wetted pads and per-panel remounting keep the owner in the loop every session.

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.

HUTT DDC55
Windows with no immovable anchor point for the safety rope
HUTT's procedure requires the safety rope's locking ring to be fixed to a solid object that cannot be dragged, and requires the rope to be checked before every run for secure attachment and damage. Where a window offers no such anchor within reach, the machine should not be run on it.
Hard-water areas or homes with frequently soiled panes
The cloths are wetted by hand before a run and the machine carries no water of its own, so mineral deposits and heavy pollen mean pre-treating the pane and changing the cloth part way through.
Owners needing app control, scheduling or mapping
The DDC55 is driven from a handheld remote. There is no network connection, no app and no schedule, and the machine has to be placed on each pane by hand before it will run.
Mamibot iGLASSBOT W120-T
Frameless glass, and textured, frosted or curved surfaces
Mamibot's manual prohibits use on frameless glass outright, which is the flat case owners most often assume is fine. Suction loss on textured and frosted surfaces is separately documented across owner reports.
Users expecting fully autonomous multi-panel cleaning runs
The unit is remounted and the rope re-anchored between separate panels. There is no dock, no multi-panel routing and no resume.
Homes with upper-floor windows far from power outlets
The unit is mains-powered and ships with an adapter and extension cable. Windows beyond that run are impractical, and the tether sets the working height as much as the glass does.
Owners needing cordless battery-only operation
The W120-T runs from mains power. The 600 mAh cell on board is a backup that holds the unit on the glass if power is cut, not a runtime battery, so use is restricted to windows near an outlet.

What stays your job

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

HUTT DDC55
  • Before every run: Check that the safety rope is undamaged and that its locking ring is fixed to a solid object that cannot be dragged.
  • After every use: Remove the cleaning cloths from the turning discs, rinse them and let them dry before the next run.
  • Weekly: Inspect the cloths for loose threads, tears or embedded grit and replace worn cloths.
  • Bi-weekly: Clean the vacuum intake and motor filter with a soft brush, especially in dusty environments.
  • Monthly: Inspect the power cable, adapter and extension lead for insulation damage, and confirm the extension lead’s locking knob is tight.
  • Seasonally: Before extended storage, dry all components and store the cable loosely indoors to prevent moisture damage.
Mamibot iGLASSBOT W120-T
  • Before every use: Confirm the backup battery is fully charged, and tie the safety rope to a secure indoor fixture.
  • After every use: Rinse and wring the microfiber pads; allow to air-dry before storage.
  • Weekly: Inspect the safety rope along its length for fraying, and check the fixture it is tied to.
  • Monthly: Wipe the suction cup and intake filter with a damp cloth to maintain seal integrity. Do not spray or pour water onto the device.
  • Every 30-50 sessions: Replace the microfiber cleaning pads (sold separately).
  • As needed: Inspect the power cable and connector for wear near strain-relief points.
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
HUTT DDC55 Discontinued 1 Aug 2026
Mamibot iGLASSBOT W120-T Verified 5 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.