Maytronics is a producer of some of the most premium robotic pool cleaners on the market. The company is known for constantly tweaking and upgrading its technology to make each cleaner more efficient, powerful and precise than the next. These qualities are evident in the Dolphin Sigma and the Dolphin Nautilus CC Plus.

Dolphin Sigma vs Nautilus CC Plus: Robotic Pool Cleaner Comparison

Dolphin Sigma

The smartphone-compatible Dolphin Sigma offers remote navigation that’s guided by a gyroscope and a redesigned processor. You’ll appreciate the durability of the tangle-free power cable and the multiple DC motors. Features such as two snap-apart filters and four brushes will keep your pool inviting all summer long.

If you don’t need a robot with all the bells and whistles, the Nautilus CC Plus is speedy cleaner. It boasts a short cleaning cycle time and top-loading filters. The rotating cable stretches long enough to accommodate 50-foot swimming pools, and it relies on Maytronics’ ever-reliable CleverClean technology to dodge obstacles.

Nautilus CC Plus vs Dolphin Sigma: Robotic Pool Cleaner Comparison

Dolphin Nautilus CC Plus


Routing and Maneuvering

Dolphin Sigma
SmartNav 3.0 is the latest navigational software from Maytronics. With SmartNav 3.0 and a gyroscope, the Sigma doesn’t make illogical movements or wide turns. If you install the MyDolphin app on your iPhone or Android, you can control the robot’s navigation no matter the shape of your pool.

The 60-foot-long cable on the Dolphin Sigma rotates in a complete 360-degree circle, preventing tangles and frayed wires. Since the cord is so long, the robotic pool cleaner can cover not only the entire floor of a 50-foot swimming pool but also the walls and waterline of the pool.

Dolphin Nautilus CC Plus
As the name suggests, the Nautilus CC Plus’ CleverClean technology truly is clever. This technology thoroughly scans your swimming pool to plan a route that saves the most time, and it helps the robot veer away from ladders, drains and other objects.

Maytronics also put a swiveling cable on the Dolphin Nautilus CC Plus, so the cord won’t become knotted as the robot makes turns. Since the cable measures 60 feet in length, the robotic cleaner can easily vacuum a pool as big as 50 feet. Its cleaning range isn’t restricted to just floors – the CC Plus also cleans vertical and curved walls.

Dolphin Sigma vs Nautilus CC Plus

Dolphin Sigma

Conclusion: Each robotic pool cleaner is equipped with excellent navigational software. The inclusion of a gyroscope on the Dolphin Sigma allows the robot to make tight turns. Both have a lengthy cable that swivels, and the Sigma can suction at the waterline.

Cleaning Cycles and Scrubbing Action

Dolphin Sigma
Inside of the Dolphin Sigma pool cleaner, there are three 24-volt, commercial-grade motors. One DC motor controls the two tracks that spin counter to one another while the other DC motors operate the set of double brushes, which remove algae and debris as they revolve.

The soft-touch buttons on the power supply give you the option of running the Sigma on an automatic schedule that occurs every day, twice per week or three times per week. Alternatively, you can use the remote to start a cleaning cycle while you sunbathe in a lounge chair. Once a cycle starts, your pool will be clean in just 2.5 hours.

Nautilus CC Plus vs Dolphin Sigma

Dolphin Nautilus CC Plus

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Dolphin Nautilus CC Plus
Whether your swimming pool is rectangular or oval, the Nautilus CC Plus can clean it. The pair of heavy-duty tracks on the robotic cleaner has a mighty grip. This robot also boasts two deep-scrub brushes that leave no filth behind.

The CC Plus also comes with a power supply box. From this box, you can set a timer that will run the robot even if you aren’t home. Depending on your swimming pool’s needs and cleanliness level, you can set the timer to once, twice or thrice weekly. Each cycle takes a mere 2 hours to finish, which means it won’t take long to get your pool party-ready.

Conclusion: Since the Dolphin Sigma has three motors to control, it won’t reduce its performance when scrubbing and driving. With four brushes instead of two, the Sigma has efficient scrubbing action. Both robotic cleaners come with a timer-equipped power supply, and they can clean a swimming pool in fewer than 3 hours.

Dolphin Sigma

Dolphin Sigma

Filtration and Maintenance

Dolphin Sigma
The larger a filter, the more contaminants it can catch. To maximize its filtration potential, Maytronics added two large filters to the Dolphin Sigma. These top-loading filters are easy to disconnect from one another so that you can rinse them quickly. The Sigma also has a full-filter indicator to let you know when it’s time to clean them.

At 24.6 pounds when dry, the Sigma falls into the mid-weight category in terms of robotic pool cleaners in general. However, it has a thoughtfully crafted lifting handle. With its concave palm grip, pulling out the robot from the water is a breeze.

Dolphin Nautilus CC Plus
With filter accessibility on the top and not the bottom, the Nautilus CC Plus’ filters are easy to reach. Combined, both filters trap the finest of debris. All you need to do is rinse the filters to maintain their effectiveness.

Maytronics built this robotic pool cleaner in a lightweight body, weighing 19 pounds when not immersed in the water. To keep the robot from being bogged down with water when you pull it out of the swimming pool, the quick-release mechanism pushes out the water at a rapid pace. The robotic pool cleaner also has a textured handle, so your hand won’t slip.

Nautilus CC Plus

Dolphin Nautilus CC Plus

Dolphin Nautilus CC vs Nautilus CC Plus: Robotic Pool Cleaner Comparison

Conclusion: Taking care of either robot’s filters is an easy job, especially with the Sigma and its filter alert. Each model comes with two filters that rest in a top-located compartment. Although the Dolphin Sigma is about 6 pounds heavier than the Nautilus CC Plus, the recess in the handle offers a more secure grip.

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Sigma vs Nautilus: Two Dynamic Robotic Pool Cleaners

With tracks as opposed to wheels and a swiveling, anti-friction power cable, the Sigma and the Nautilus CC Plus are built to last. Each model is easy to maintain thanks to a dual filter setup in a door that opens from the top. Plus, you can set a timer for both robots in order to automate a cleaning schedule.

Dolphin Sigma vs Nautilus CC Plus: Robotic Pool Cleaner Comparison

Even though the Sigma contains SmartNav 3.0 software with a gyroscope while the Dolphin Nautilus CC Plus uses CleverClean technology, each model is well-adept at figuring out a non-repeating path. The Dolphin Sigma is Bluetooth-enabled to maximize its usability, and it cleans along the waterline instead of just the walls and floor.

You’ll appreciate how lightweight the Nautilus CC Plus feels when you lift it; the quick water release feature helps. Although it has two brushes as opposed to the Sigma’s four, the wide brushes do a great job at removing stubborn grime. The Dolphin Sigma may offer more features, but both robotic pool cleaners are worthwhile investments.

Nautilus CC Plus vs Dolphin Sigma: Robotic Pool Cleaner Comparison


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23 x 19.5 x 13.5 in 23.5 x 19.5 x 14 in 16.4 x 16.8 x 9 in
40.6 pounds 37.2 pounds 14 pounds

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