HOBOT
HOBOT S7 Pro
- Autonomy
- IIIConditional
- Score
- 65/100Capable
- Readiness
- Ready Now
- Price
- $460list
ComparisonHOBOT S7 Pro and HUTT A1
HUTT
HUTT A1
- Autonomy
- IIIConditional
- Score
- 59/100Capable
- Readiness
- Ready Now
- Price
- $270list
Up to three
Autonomy Ladder
- IManual
- IIAssisted
- IIIConditional
- IVEnvironmental
- VGeneralized
All robot window cleaners. Every figure below is placed against the whole class, so a gap can be read against how much the class itself varies.
Where each one suits you.
The conditions each robot was assessed against, side by side. Rows marked in gold are where these machines genuinely differ.
| Condition | HOBOT S7 Pro | HUTT A1 |
|---|---|---|
| Window style | ||
| Standard residential | GoodDesigned for standard horizontal-sliding and framed windows up to 86 inches; edge detection aligns with frame geometry. | Good6000Pa suction and laser edges handle standard residential panes reliably. |
| Large panes (8 ft+) | DependsLarger panes work but edge sensor coverage may miss frameless corners; manual repositioning may be needed. | DependsLarge panes work but edge detection may require manual repositioning between swipes. |
| Specialty / textured | PoorSpecialty glass (skylights, curved, skylights) and frameless designs exceed auto-pathing capability and edge-detection scope. | PoorFrameless, skylights, and architectural glass confuse edge sensors; unreliable coverage. |
| Frame style | ||
| Frameless / minimal | PoorEdge detection and auto-pathing depend on frame geometry; frameless windows have no reference edges for navigation. | PoorLaser edge detection fails without frame definition; owner reports document frequent false stops. |
| Standard mullions | GoodStandard aluminum or vinyl framed windows are the design target; edge sensor performance is predictable and reliable. | GoodMetal or vinyl frames provide reliable edge boundaries for autonomous pathing. |
| Heavy bezelsthey differ | DependsHeavy frames (steel, wood) are acceptable but may interfere with edge sensor readings near frame edges; test before full sessions. | GoodHeavy frames (thick-profile metal or architectural) are well-detected by laser; no performance penalty. |
| Building height | ||
| Single-story | GoodGround-floor and first-story windows suit rope-anchor setup; minimal rope length required and safe operator control. | GoodGround-floor and single-story operation fully supported; cord and rope management straightforward. |
| 2 – 3 stories | DependsSecond and third stories are feasible with extended rope and secure anchor points; operator must maintain visual contact and rope tension. | DependsTwo-story access is marginal; verify cord length and ensure safe anchor point for rope. |
| 4+ stories | PoorAbove three stories, rope management, anchor reliability, and operator control become impractical; professional equipment required. | PoorCorded operation and rope management impractical above two stories; height-rated anchors unavailable. |
| Power preference | ||
| Corded OK | GoodCorded tether design is the primary operation mode; 4800Pa suction is consistent throughout the session. | GoodCorded operation is the native design; stable suction without battery fade. |
| Cordless preferred | PoorHOBOT S7 Pro is tethered only; no cordless or battery-backup option exists. | PoorHUTT A1 is corded only; no cordless variant available. |
| No preference | GoodIf your setup accepts a tethered robot, the S7 Pro is a solid fit; rope anchor is the only constraint. | GoodCorded-capable, though cordless robots in this category may suit mobile households. |
A robot being poor for a condition is a fact about fit, not a fault. “Depends” means the record names a limit worth reading, not that the answer is unknown.
What the score is built from.
Nine inputs across three pillars, each weighted as shown and each scored so more is better. A robot can lead on one and trail on another, which is the point of showing them apart.
Capability
Task completion16% of score
Does it finish the job it is sold to do, unattended
7975
- HOBOT S7 Pro79
- HUTT A175
18median 72 across 433 scored robots100
Coverage and navigation10% of score
Does it work the whole area, and hold that between runs
8575
- HOBOT S7 Pro85
- HUTT A175
0median 70 across 421 scored robots100
Edge-case recovery10% of score
Does it recover from the failures its category presents
4265
- HOBOT S7 Pro42
- HUTT A165
18median 52 across 320 scored robots100
Operating envelope4% of score
How far conditions can vary before performance drops
7675
- HOBOT S7 Pro76
- HUTT A175
28median 68 across 397 scored robots100
Dependability
Field failure rate16% of score
Documented hardware failures per owner-year
6470
- HOBOT S7 Pro64
- HUTT A170
6median 70 across 359 scored robots100
Software stability14% of score
Whether updates fix more than they break
7133
- HOBOT S7 Pro71
- HUTT A133
15median 65 across 342 scored robots100
Support longevity10% of score
Committed parts, service and updates, with dates
5832
- HOBOT S7 Pro58
- HUTT A132
0median 62 across 429 scored robots100
Ownership burden
Routine maintenance12% of score
Hands-on time it asks for in normal operation
3640
- HOBOT S7 Pro36
- HUTT A140
22median 67 across 434 scored robots100
Consumables8% of score
Parts that must be bought to keep it working
8066
- HOBOT S7 Pro80
- HUTT A166
8median 69 across 434 scored robots100
How far apart is a long way?
A number only means something next to the spread it sits in. Each track is the real range across every classified robot in the class, with the median marked.
Price21 with a published figure
$460$270
- HOBOT S7 Pro$460
- HUTT A1$270
$150median $349$850
Adhesion (mode not stated)19 with a published figure
4,800 Pa6,000 Pa
- HOBOT S7 Pro4,800 Pa
- HUTT A16,000 Pa
2,800 Pamedian 3,800 Pa10,000 Pa
Not compared, because fewer than two of these robots carry a published figure: Runtime, Charge time, Noise, Weight, Height.
What the numbers leave out.
Written on each record, and the only thing here every robot on the site carries.
The trade-off
What each design gives up to be good at what it is good at.
HOBOT S7 Pro
You gain consistent 4800Pa suction but forfeit mobility; the rope tether anchors the robot to one location per setup.
Auto-pathing saves manual repositioning on framed windows, but edge sensors require frequent cleaning to maintain navigation reliability.
HUTT A1
Auto-pathing is limited to edge detection, not full-window mapping. Oversized or irregular panes may require multiple manual passes.
Corded operation eliminates battery anxiety but adds tether management and anchoring burden on higher stories.
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 S7 Pro
- Panes with no interior outlet or fixed object to tie to
- The unit runs on mains power through a 4 m cord extending to 8 m, and HOBOT's instruction is to tie the 4.5 m safety rope to a fixed object indoors. Where the room behind the glass offers neither, the setup HOBOT specifies cannot be built.
- Panes the operator cannot reach to place and retrieve the unit
- The S7 Pro is set on the glass by hand and taken off by hand. It does not travel between panes or openings, so every pane needs an operator present to anchor the rope, start the run and remove the unit afterward.
- Operators wanting cordless operation
- The S7 Pro runs from mains power and stays corded throughout a session. Its built-in UPS is backup power that holds adhesion for about 20 minutes if that power is interrupted, not a cordless operating mode.
HUTT A1
- Windows with no solid indoor anchor for the safety rope
- The safety rope is the fall protection, and it has to be secured to a fixture indoors or to something solid that cannot be dragged toward the opening. Where no such anchor exists within reach of the pane, the machine should not be run on an exterior surface.
- Panes with no mains outlet within reach
- The A1 runs on mains power through a cord; the internal battery is fall protection, not a runtime source. HUTT does not publish the cord length, so an outlet within reach of each pane is a setup requirement to confirm before purchase.
- Operators unwilling to inspect safety equipment before every run
- Rope condition and motor dust accumulation require checking. Maintenance is routine but non-optional for safe operation, and the rope check comes before the machine goes on the glass, not weekly.
What stays your job
The upkeep ownership hands back to you, whatever the autonomy level says.
HOBOT S7 Pro
- After every use: Wipe water droplets from mop pads and sensors; store pads in dry state to prevent mold.
- Weekly: Check safety rope for knots, fraying, or kinks; unwind snags before next session.
- Every 3-6 months: Replace mop pads (~$30-40 per pair) if streaking or reduced scrubbing action is visible.
- Monthly: Clean suction motor intake filter and motor housing with dry brush to maintain 4800Pa suction.
- Annually: Inspect edge sensors for lens damage; replace rope if it shows signs of wear or reduced strength.
HUTT A1
- Before every run: Inspect the safety rope for cuts, fraying or a damaged weave, and confirm the anchor is a fixture indoors or something solid that cannot be dragged toward the opening. Do not run the machine on exterior glass with a damaged rope.
- Monthly: Wash or replace the nanofiber cloth; inspect the suction intake for debris.
- Monthly: Clear spray nozzles of mineral buildup (cold-water systems).
- Every 3-6 months: Deep-clean motor housing and sensor lenses, including the laser edge sensor.
- On condition: Replace the safety rope when the weave is cut or the fibers are visibly worn. HUTT publishes no replacement interval, so this is an inspection call rather than a calendar one.
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.
| Robot | Evidence status | Sources reviewed | Last assessed |
|---|---|---|---|
| HOBOT S7 Pro | Provisional | 4 | Aug 2026 |
| HUTT A1 | Pending | 4 | Aug 2026 |
Evidence status counts the sources behind a classification, not their kind. A high count can be maker documentation and price coverage, so read it as how much was reviewed rather than as independent testing. How we weigh evidence.
Keep going.
The full recordHOBOT S7 ProSpecifications, evidence, the Fit Check in full, and every tracked change.
The full recordHUTT A1Specifications, evidence, the Fit Check in full, and every tracked change.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.
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