Quick verdict
A genuinely capable budget cordless cleaner: real wall and waterline coverage, decent runtime, and app control at a fraction of flagship pricing. The trade-offs are a 2-year warranty (a year short of iGarden's pricier lines) and coarser 180-micron filtration. Step up to iGarden's K Pro or AI lines for finer filtration and longer coverage; step down only if you need the absolute cheapest floor-only option.
Ideal for
- Budget-conscious owners who still want floor, wall, and waterline coverage
- Small to mid-size in-ground or above-ground pools up to about 5,683 sq ft
- Owners who want cordless simplicity without running a power cord to the pool
Not ideal for
- Pools larger than 5,683 sq ft or with deep ends beyond 2.5 m
- Buyers who want AI obstacle avoidance or camera-based mapping
- Anyone wanting the extra year of warranty coverage on iGarden's K Pro or AI lines
The full picture
The iGarden KN Series is a budget cordless robotic cleaner offered in two variants that share the same core design. The KN35 runs up to 3.5 hours and covers pools up to 3,617 sq ft, while the KN55 runs up to 5.5 hours and covers pools up to 5,683 sq ft. Both climb slopes up to 30 degrees, clean the floor, walls, and waterline, and use 3D S-Path navigation with self-parking when a cycle ends. Filtration runs through a 180-micron filter into a 3.2-liter basket, and app control over Wi-Fi and Bluetooth offers four cycle lengths and three cleaning modes. It's a straightforward, no-frills cordless cleaner aimed at owners who want real coverage and runtime without paying flagship prices.
iGarden KN Series at a glance
- Cleaning coverage
- Floor + walls + waterline
- Pool type
- In-ground and above-ground
- Max pool size (ft)
- 39
- Cordless
- Yes
- Battery life (min, mfr claim)
- 330
- Charge time (hr)
- 5
- Wall climbing
- Yes
- Waterline cleaning
- Yes
- Filtration
- 180-micron filter; 3.2L basket
- Debris capacity (L)
- 3.2
- Weight (lb)
- 17.9
- App control
- Yes
- Weekly timer
- No
Source: Specs sourced from store.igarden.ai's KN Series product page (store.igarden.ai/products/igarden-robotic-pool-cleaner-kn-series); pricing cross-checked against listed Amazon pricing where available. All figures are manufacturer claims, not independently tested.
This is a research-based review — our analysis draws on manufacturer specifications, manuals, warranty terms, and verified owner feedback rather than our own hands-on testing, and we note where a detail couldn't be confirmed. How we review
The in-depth review
The iGarden KN Series is the brand's entry point into cordless robotic cleaning, sold as two variants (the KN35 and the KN55) that share the same design but differ in runtime, suction, and price. It's built for owners who want more than a basic floor-only bot but don't want to pay flagship prices for AI cameras or app features they'll rarely use.
Two variants, one goal: full coverage without a cord
Both models clean the floor, walls, and waterline, climb slopes up to 30 degrees, and run entirely cordless. The KN35 is rated for up to 3.5 hours of runtime and typically sells around $399 on sale (list $699), while the KN55 stretches to 5.5 hours and runs around $549 (list $999). That extra runtime on the KN55 also comes with a size and weight jump, so the choice mostly comes down to pool size and how much you want to lift out of the water.
Suction, filtration, and how much dirt it holds
The KN35 is rated at 4,491 GPH (about 17,000 LPH) and the KN55 at 4,755 GPH (about 18,000 LPH), each powered by three motors drawing 20 to 100 watts depending on mode. Debris runs through a 180-micron filter into a 3.2-liter basket, a coarser mesh than premium models use for fine silt, but reasonable for leaves, bugs, and everyday grit at this price.
Climbing, navigation, and daily use
iGarden uses 3D S-Path planning to map coverage and self-parks when a cycle finishes, so you're not fishing it out of the deep end. The KN35 covers pools up to 6x10 m (3,617 sq ft) and the KN55 up to 6x12 m (5,683 sq ft), with both rated for water depths of 1 to 2.5 m, temperatures of 4 to 35 C, pH 7.0 to 7.8, and chlorine up to 4 ppm. Both work in-ground or above-ground.
App control and cleaning modes
Setup runs through 2.4 GHz Wi-Fi and Bluetooth to a companion app, where you can pick cycle lengths (1H, 1.5H, 2H, or MAX) and choose between floor-only, wall-and-waterline-then-floor, or full-coverage modes. It's a practical set of options rather than a showcase of extras, which fits the budget positioning.
Where it falls short
The biggest catch is warranty coverage: the KN Series carries a 2-year warranty, a full year shorter than iGarden's K, K Pro, and AI lines. For a robotic cleaner that lives in chlorinated water, that's a meaningful gap and worth weighing against the lower purchase price. The KN55 also weighs about 28.4 lb wet (versus 17.9 lb for the KN35), which is a real lift for anyone without a caddy or a helper. Filtration at 180 microns is also coarser than what mid-range and premium cleaners offer, so very fine debris and algae dust will pass through more easily.
Performance breakdown
Research-based editorial judgments from specs, warranty terms, and verified owner feedback — not lab measurements. How we score
Pros and cons
What works
- Cordless with strong runtime for the price (up to 5.5 hours on the KN55)
- Climbs 30-degree slopes and cleans floor, walls, and waterline
- App control with four cycle lengths and self-parking when done
What doesn't
- 2-year warranty, a full year shorter than iGarden's K, K Pro, and AI lines
- 180-micron filtration is coarser than mid-range and premium cleaners
- KN55 weighs about 28.4 lb wet, a real lift without a caddy or helper
Best alternatives to iGarden KN Series
Aiper
Aiper Scuba SE
Best budget above-ground cordless
A budget cordless floor cleaner for above-ground pools: no cable, about 90 minutes of runtime, for pools up to 860 sq ft.
Pentair
Pentair Prowler 910
Best Pentair above-ground robot
Pentair's above-ground robot: self-contained floor cleaning with fine-mesh top-access filtration for soft-walled pools.
iGarden
iGarden KN-AI Series (KN-AI 40)
Cheapest AI-vision iGarden
iGarden's most affordable AI-vision robot, cleaning floors, walls, and the waterline for up to 4 hours cordless.
Aiper
Aiper Scuba L1
Best cordless above-ground Aiper
A cordless above-ground Aiper: floor cleaning for pools up to 33 ft with two-stage 180μm-plus-ultra-fine filtration.
Frequently asked questions
What's the difference between the iGarden KN35 and KN55?
The KN35 runs up to 3.5 hours, delivers 4,491 GPH suction, weighs about 17.9 lb, and covers pools up to 3,617 sq ft for around $399. The KN55 runs up to 5.5 hours, delivers 4,755 GPH suction, weighs about 28.4 lb, and covers pools up to 5,683 sq ft for around $549.
How long does the iGarden KN Series battery last, and how long does it take to charge?
The KN35 runs up to 3.5 hours and recharges in about 3 hours. The KN55 runs up to 5.5 hours and recharges in about 5 hours.
Can the KN Series climb walls and clean the waterline?
Yes. Both models climb slopes up to 30 degrees and offer a dedicated wall-and-waterline-then-floor mode, plus a full-coverage mode that cleans floor, walls, and waterline in one cycle.
What size pool can the iGarden KN Series handle?
The KN35 is rated for pools up to 6x10 m (3,617 sq ft) and the KN55 for pools up to 6x12 m (5,683 sq ft), with water depths of 1 to 2.5 m.
Is the iGarden KN Series app-controlled?
Yes. It connects over 2.4 GHz Wi-Fi and Bluetooth, letting you choose between 1, 1.5, 2-hour, or MAX cycle lengths and select floor-only, wall-and-waterline, or full-coverage modes.
What is the warranty on the iGarden KN Series?
The KN Series carries a 2-year warranty, which is a year shorter than the 3-year warranty on iGarden's K, K Pro, and AI lines. Factor that into the lower purchase price when comparing options.