Comparison · 2 robots

Hobot R3 · HUTT C6

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.

Hobot R3
HUTT C6

HOBOT

Hobot R3

Autonomy: II Assisted Autonomy
Score: 55/100 Capable
Readiness: Ready Now
Price: $400list

HUTT

HUTT C6

Autonomy: II Assisted Autonomy
Score: 38/100 Deficient
Readiness: Promising Progress
Price: $399list

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.

Generalized

Any task, any setting

Environmental

Handles new obstacles without help

III

Conditional

Finishes familiar jobs on its own

Assisted

Runs preset routines, needs rescue

Hobot R3HUTT C6

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

6844

Hobot R368
HUTT C644

Coverage and navigation10% of score

Does it work the whole area, and hold that between runs

7042

Hobot R370
HUTT C642

Edge-case recovery10% of score

Does it recover from the failures its category presents

4534

Hobot R345
HUTT C634

Operating envelope4% of score

How far conditions can vary before performance drops

6065

Hobot R360
HUTT C665

Dependability

Field failure rate16% of score

Documented hardware failures per owner-year

5629

Hobot R356
HUTT C629

Software stability14% of score

Whether updates fix more than they break

6533

Hobot R365
HUTT C633

Support longevity10% of score

Committed parts, service and updates, with dates

5235

Hobot R352
HUTT C635

Ownership burden

Routine maintenance12% of score

Hands-on time it asks for in normal operation

2430

Hobot R324
HUTT C630

Consumables8% of score

Parts that must be bought to keep it working

5769

Hobot R357
HUTT C669

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.

Price19 with a published figure

$400$399

Hobot R3$400
HUTT C6$399

$150median $365.80$850

Adhesion (mode not stated)15 with a published figure

3,000 Pa3,800 Pa

Hobot R33,000 Pa
HUTT C63,800 Pa

2,800 Pamedian 3,800 Pa8,000 Pa

Noise16 with a published figure

66 dB70 dB

Hobot R366 dB
HUTT C670 dB

63 dBmedian 68 dB75 dB

Weight16 with a published figure

2.1 lbs1.3 lbs

Hobot R32.1 lbs
HUTT C61.3 lbs

1.3 lbsmedian 2.9 lbs4.8 lbs

Height15 with a published figure

3.7 in2.8 in

Hobot R33.7 in
HUTT C62.8 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.

Hobot R3

Dual rotating pads improve corner coverage but complicate maintenance: two separate pad holders, motor couplings, and rotation mechanisms add weekly inspection points compared to single-pad competitors.

HUTT C6

Spray-based operation introduces water-damage risk that suction-only designs avoid; moisture residue requires active frame drainage management.

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.

Hobot R3

Windows with no mains socket within about 4 meters: The cord is 4 meters and the robot draws mains power for the whole run, so the reachable set is the windows around one socket. HOBOT's own 2S and S6 Pro ship 5 meter cords.
Owners who want cordless operation: The wired design is not optional. The cell the R3 carries is an embedded UPS that keeps it in position on the glass with an alarm for 20 minutes after a power cut; it is a fall-protection measure, not a duty-cycle battery, and the robot does not clean without the cord.
Frameless or curved tempered glass surfaces: Vacuum edge detection struggles with reflections and lack of visual boundaries. Optical sensors cause frequent incorrect repositioning; manual path planning becomes tedious.

HUTT C6

Frameless or storm-window installations: Spray operation creates water pooling on frameless edges and challenges drainage. Storm windows with narrow gaps obstruct spray nozzles.
Renters or tenants avoiding liquid application on surfaces: Spray residue and moisture ingress carry property-damage liability. Suction-only alternatives are safer for rental agreements.
High-frequency multi-story window cleaning scenarios: Repositioning between stories combined with solution refill cycles creates high owner-effort workflows. Multi-floor homes demand repeated tank checks.

What stays your job

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

Hobot R3

Weekly: Rinse both pads under tap water; test pad rotation manually to ensure smooth motion; inspect nozzle spray pattern.
Monthly: Clean vacuum intake and motor filter; check pad-rotation bearings for smooth spin; soak nozzle in distilled vinegar if spray weakens.
Every 3-4 months: Replace cleaning pads (~$25-30 per pair); inspect power cable for insulation damage or fraying.
Every 6 months: Lubricate pad-rotation bearings with light machine oil (~$0, 5 min maintenance); test rotation force to detect bearing wear.
Annually: Replace motor intake filter (~$15); deep-clean nozzle assembly and pad-holder fasteners.

HUTT C6

After every use: Empty solution tank and rinse interior; wipe wiper pads with soft cloth.
Weekly: Check solution-line inlet for mineral deposits; rinse with distilled water if cloudy.
Monthly: Inspect suction cups for wear and adhesion; flush solution lines with dilute vinegar if hard-water minerals accumulate.
Every 3-6 months: Replace microfiber wiper pads (~$12-18 per pair); replace solution-filter cartridge (~$10-15).

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
Hobot R3	Pending	1	Aug 2026
HUTT C6	Provisional	3	Aug 2026