Dolphin (Maytronics) Sigma vs Wybot S3
Researched by Riley Hart · prices checked Nov 4, 2026
As of Nov 4, 2026, the Dolphin (Maytronics) Sigma costs $2,999 and the Wybot S3 costs $3,000, so the Dolphin (Maytronics) Sigma is $1 cheaper. The Wybot S3 has a published review score and ranks #16 in our robotic pool cleaners ranking; the Dolphin (Maytronics) Sigma is not scored yet. Pick the Dolphin (Maytronics) Sigma for set and forget in-ground pools. Pick the Wybot S3 for hands off cleaning of large in-ground pools. They split the points we can measure, 1 each.
Who wins, point by point
They split the points we can measure, 1 each. Built from today's prices, the specs and independent tests for these two robots.
| Sigma | S3 | Winner | |
|---|---|---|---|
| Price today | $2,999 | $3,000 | Tie |
| 3 year cost | $3,099 | $3,000 | S3 |
| Runtime | 150 min | 150 min | Tie |
| Warranty | 3 years | 2 years | Sigma |
- You care most about warranty (3 years vs 2 years)
- Best for set and forget in-ground pools
- You care most about 3 year cost ($3,000 vs $3,099)
- Best for hands off cleaning of large in-ground pools
- Cleans
- Floor
- Power
- Corded
- Runtime
- 2.5 h cycle
- Max pool
- 50 ft long
Top corded Dolphin with app control, gyro navigation and weekly timer
Full Dolphin (Maytronics) Sigma review, pros and cons →- Cleans
- Floor
- Power
- Cordless
- Runtime
- Up to 2.5 h
- Max pool
- Up to 300 sq m
Cordless robot that docks, charges and empties itself underwater
Full Wybot S3 review, pros and cons →Side by side
| Dolphin (Maytronics) Sigma | Wybot S3 | |
|---|---|---|
| Price | $2,999 | $3,000 |
| 3 year cost | $3,099 | $3,000 |
| Our score | Not scored yet | 6.0/10 |
| Rank in Pool | #37 | #16 |
| Status | on sale | on sale |
| Warranty | 3 years | 2 years, 30 day money back |
| Pool types | In-ground; rectangular, round, free shape, kidney | In-ground pools of PVC, tile, gunite or concrete, 50 cm to 3 m deep (about 1.6 to 9.8 ft); not for pools under 20 sq m or soft sided pools (Smart Home Fox, citing Wybot) |
| Cleans | Floor, walls, waterline | Floor, walls, steps and waterline. Wybot lists floor, walls and stairs; GadgetGuy saw it rise above the waterline on wall runs. No surface skimming listed |
| Power | Corded | Cordless, 7,800 mAh battery (Smart Home Fox); recharges in its underwater dock from AC, DC or a solar kit of up to 30 W |
| Runtime | Default 2.5 h cycle; no battery | Up to 2.5 h per GadgetGuy; Smart Home Fox reports about 3 h |
| Charge time | None (corded) | About 3 h on mains or DC (GadgetGuy, Smart Home Fox). GadgetGuy says solar alone needs about three days of full sun to recharge base and robot for weekly cleaning |
| Filter | Extra large multi layer top load basket; fine filter plus ultra fine kit in box | 180 µm filter box plus 40 PPI sponge; 380 µm and 180 µm plates and a 10 µm ultra fine filter in the box (Wybot). 3 L robot basket empties into a 10 L dock bin (GadgetGuy); fine filters must be hosed out about every two weeks |
| Max pool size | Pools up to 50 ft long | Up to 300 sq m, about 3,230 sq ft (maker rating cited by GadgetGuy and Smart Home Fox); Wybot's US page lists no maximum |
| App | MyDolphin Plus app over Wi-Fi with scheduling and automation | Wybot app: 3D pool map, AI vision debris detection, manual drive, 7 day scheduling; the underwater link runs through the dock (GadgetGuy) |
| Suction | 4,500 gph (maker) | n/a |
| Timer | Weekly timer | n/a |
| Weight | 24.63 lb | Robot 9.6 kg (about 21 lb), dock 5.6 kg (about 12 lb) per Smart Home Fox; GadgetGuy lists 21 kg and 76 x 48 x 74 cm, which looks like the full boxed set |
| Warranty | 3 years | 2 years (Wybot) |
| Navigation | n/a | 36 sensors plus AI camera, about 10 cm positioning accuracy (Smart Home Fox) |
| Best for | set and forget in-ground pools | hands off cleaning of large in-ground pools |
| Skip if | you do not care about app control | you have a small pool or a tight budget |
Specs are maker claims unless a reviewer is named. Prices from the stores we link, checked daily.
What reviewers found
Dolphin (Maytronics) Sigma
- The Pool Nerd: Ranked it the best robot the site has tested; the center brush rolled over the main drain every time in weeks of daily testing and its waterline cleaning was the strongest of any Dolphin tried. Affiliate site with links to Dolphin dealers. Source
Wybot S3
- Android Authority: Mapped the pool on the first run, climbed walls and scrubbed the waterline without getting stuck, and docked and emptied on its own. Docking was unreliable in a shallow area until the dock was moved to a spot with a longer approach; setup required getting into the pool. Source
- GadgetGuy (8.5/10): Up to 2.5 h runtime and about 3 h mains charging; transferred debris to the 10 L dock cassette and lifted above the waterline on wall runs. Finer 180 µm and 10 µm filters do not clear through the auto transfer and need hosing about every two weeks. Value scored 6 of 10. Source
Questions buyers ask
Which is better, the Dolphin (Maytronics) Sigma or the Wybot S3?
The Wybot S3 has a published review score and ranks #16 in our robotic pool cleaners ranking; the Dolphin (Maytronics) Sigma is not scored yet. Pick the Dolphin (Maytronics) Sigma for set and forget in-ground pools. Pick the Wybot S3 for hands off cleaning of large in-ground pools.
Which is cheaper?
The Dolphin (Maytronics) Sigma at $2,999, versus $3,000 for the Wybot S3, checked Nov 4, 2026. Over 3 years with running costs: $3,099 vs $3,000.
What is the difference between the Sigma and the S3?
Pool types: In-ground; rectangular, round, free shape, kidney on the Sigma, In-ground pools of PVC, tile, gunite or concrete, 50 cm to 3 m deep (about 1.6 to 9.8… on the S3. Cleans: Floor, walls, waterline on the Sigma, Floor, walls, steps and waterline. Wybot lists floor, walls and stairs; GadgetGuy saw it… on the S3. Power: Corded on the Sigma, Cordless, 7,800 mAh battery (Smart Home Fox); recharges in its underwater dock from AC… on the S3.
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All robotic pool cleaners, ranked
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