# Dolphin Nautilus CC Supreme vs Dolphin (Maytronics) Sigma

As of Nov 4, 2026, the Dolphin Nautilus CC Supreme costs $1,449 and the Dolphin (Maytronics) Sigma costs $2,999, so the Dolphin Nautilus CC Supreme is $1,550 cheaper. Pick the Dolphin Nautilus CC Supreme for in-ground pools that want daily corded cleaning. Pick the Dolphin (Maytronics) Sigma for set and forget in-ground pools.

Prices checked Nov 4, 2026. HTML version: https://robotsforthat.com/vs/dolphin-nautilus-cc-supreme-vs-dolphin-sigma/

## Side by side

| | Dolphin Nautilus CC Supreme | Dolphin (Maytronics) Sigma |
|---|---|---|
| Price | $1,449 | $2,999 |
| 3 year cost | $1,449 | $3,099 |
| Our score | Not scored yet | Not scored yet |
| Rank in Pool | #33 | #37 |
| Status | on sale | on sale |
| Warranty | 1 year (Maytronics US store) | 3 years |
| Pool types | In-ground pools; rectangular, round, free form and kidney shapes (Maytronics) | In-ground; rectangular, round, free shape, kidney |
| Cleans | Floor, walls and waterline with waterline scrubbing (Maytronics); PCWorld saw six roller brushes and two side treads | Floor, walls, waterline |
| Power | Corded, runs independently of the pool pump (Maytronics); PCWorld measured a 50 ft cable | Corded |
| Runtime | Maytronics lists a 2.5 h default cycle and a 1.5 h option; PCWorld also ran a 3.5 h mode | Default 2.5 h cycle; no battery |
| Charge time | None needed, corded | None (corded) |
| Filter | Top access cartridge filters with a fine filter kit; ultra fine kit included, rated down to 2 microns (Maytronics); 4,500 gph suction | Extra large multi layer top load basket; fine filter plus ultra fine kit in box |
| Max pool size | Pools up to 50 ft long (Maytronics) | Pools up to 50 ft long |
| App | MyDolphin Plus app over Wi-Fi and Bluetooth with weekly timer, delay and automation mode (Maytronics); PCWorld found the app slow and sometimes failed to connect | MyDolphin Plus app over Wi-Fi with scheduling and automation |
| Weight | 24.63 lb robot (Maytronics); PCWorld measured about 41 lb with cable and power supply | 24.63 lb |
| Warranty | 1 year (Maytronics) | 3 years |
| Suction | n/a | 4,500 gph (maker) |
| Timer | n/a | Weekly timer |
| Best for | in-ground pools that want daily corded cleaning | set and forget in-ground pools |
| Skip if | you want a long warranty for the money | you do not care about app control |

## What reviewers found

### Dolphin Nautilus CC Supreme

- PCWorld: Tested for about 10 days. Collected roughly 90% of test debris in about an hour and regularly 95% or more on the 3.5 h cycle; saw no difference between regular and ultra clean modes. Cleanup of six filter pieces was tedious, the app was slow, and the 25 lb robot was hard to lift out. [Source](https://pcworld.com/article/3134641/maytronics-dolphin-nautilus-cc-supreme-review.html)
- The Pool Nerd: Rated it Pool Nerd Disapproved on value, not cleaning: strong floor, wall and waterline cleaning with dual scrub brushes, but only a 1 year warranty and standard cartridge filters on an older platform. The site earns affiliate commissions. [Source](https://www.thepoolnerd.com/dolphin-nautilus-cc-supreme-review)

### 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](https://www.thepoolnerd.com/dolphin-sigma-review)

## Questions buyers ask

### Which is better, the Dolphin Nautilus CC Supreme or the Dolphin (Maytronics) Sigma?

Pick the Dolphin Nautilus CC Supreme for in-ground pools that want daily corded cleaning. Pick the Dolphin (Maytronics) Sigma for set and forget in-ground pools.

### Which is cheaper?

The Dolphin Nautilus CC Supreme at $1,449, versus $2,999 for the Dolphin (Maytronics) Sigma, checked Nov 4, 2026. Over 3 years with running costs: $1,449 vs $3,099.

### What is the difference between the Nautilus CC Supreme and the Sigma?

Pool types: In-ground pools; rectangular, round, free form and kidney shapes (Maytronics) on the Nautilus CC Supreme, In-ground; rectangular, round, free shape, kidney on the Sigma. Cleans: Floor, walls and waterline with waterline scrubbing (Maytronics); PCWorld saw six roller… on the Nautilus CC Supreme, Floor, walls, waterline on the Sigma. Power: Corded, runs independently of the pool pump (Maytronics); PCWorld measured a 50 ft cable on the Nautilus CC Supreme, Corded on the Sigma.

Full reviews: [Dolphin Nautilus CC Supreme](https://robotsforthat.com/robot/dolphin-nautilus-cc-supreme/index.md), [Dolphin (Maytronics) Sigma](https://robotsforthat.com/robot/dolphin-sigma/index.md)