Dolphin Sigma

Dolphin Sigma robotic pool cleaner review


Product score

The scoring is based on user reviews and experiences on major online stores and our personal opinions about the product. We consider how well it works, its features, how much it costs, and how easy it is to use when we give something a score.



Table of Contents

The Dolphin Sigma is a state-of-the-art robot pool cleaner from Maytronics, the leading name in robotic pool cleaners.

With a high level of cleaning power and an impressive list of features, this advanced cleaning machine is a game-changer for keeping your pool spotless. This cutting-edge device will leave your pool sparkling clean with advanced navigation technology and an effective scrubbing brush that works its way around every corner of the pool. So if you’re looking to take your pool maintenance to the next level, read more and check out what the Sigma can do.

Dolphin Sigma underwater

Pros and Cons

The Dolphin Sigma pool cleaner is a high-tech robotic device that offers a number of benefits for pool owners. Its smart navigation algorithms allow it to effectively clean the entire floor, walls, and tile/waterline of the pool in an efficient and precise manner. In addition, it utilizes a gyroscope mobility system that gives it optimal traction on any type of surface. The device also features dual high-capacity filters that efficiently remove even the smallest debris from the water.

While the Dolphin Sigma cleaner does have many advantages, there are some potential cons as well. Its high price point may be prohibitive for some pool owners, and its advanced mechanics do require some maintenance to keep them working properly over time. Nevertheless, for those who can afford it and are willing to put in the effort to maintain it, the Sigma robot pool cleaner is an excellent option for maintaining a clean and healthy pool.

The features of the Sigma.

High-quality filtering

dolphin sigma dual filters

The Dolphin Sigma is a unique robotic pool cleaner that incorporates dual high-capacity filters into its design. With these massive top-loading filtration cartridges, the Sigma robot can take full control of your pool, providing you with intense scrubbing power on all surfaces and maintaining high flow rates and suction throughout the cleaning cycle. Whether you’re dealing with algae build-up or need to remove stubborn debris from corners and crevices in your pool, this powerful robotic cleaner has got you covered.

Triple High output motors

With its triple 24-volt DC motors, the Sigma can deliver a high flow rate while simultaneously scrubbing floors, walls, and waterlines with its dual brushes. This efficient design allows the Sigma to remove algae and bacteria from even the difficult-to-reach spots in your pool in just 2.5 hours. Whether you’re looking for a thorough deep clean or simply to maintain cleanliness, the Dolphin Sigma robot pool cleaner will get the job done quickly and efficiently.

Smart navigation

Dolphin Sigma navigation

The Dolphin Sigma is designed with next-generation Smart Navigation software that employs a state-of-the-art gyroscope for highly optimized cleaning. This advanced system is able to scan the entire pool and pay extra attention to the floor, wall, and tile/waterline regions. Unlike ordinary robots, which are unable to resolve orientation and tilt, the unit features a 3-axis gyroscope that monitors angular velocity around all three axes of rotation in order to provide optimal performance. Thanks to its innovative technology, this powerful robot can clean even the most complex pools with unparalleled precision and efficiency.

Dual scrubbing brush system

dolphin sigma dual scrubbing brush system

The Dolphin Sigma is equipped with a unique and powerful dual scrubbing brush system. This brush system features two rotating brushes that contact the pool surface directly, providing thorough agitation and cleaning. In addition, the Sigma also comes equipped with a third oscillating brush known as the CleanSweep brush, which works to dislodge even the most stubborn contaminants from the walls of your pool.

Thanks to these three powerful brushes and other advanced features, the Dolphin Sigma has become one of the most efficient and effective pool cleaners on the market today. Whether you are dealing with algae, bacteria, or biofilm that has become deeply embedded in your pool walls, this versatile robotic cleaner will get your pool looking crystal clear in no time at all.

Smart control plus extra features

The Sigma Dolphin is more than just a powerful and efficient pool cleaner – it is also equipped with several advanced features that make it an ideal choice for residential pools of all sizes. For example, the swivel cable on the robot prevents tangling, making it easy to navigate large pools of up to 50 feet. Additionally, the Sigma comes backed by 3-year quality assurance, ensuring that you can trust this pool cleaner to provide excellent performance for years to come.

Sigma swivel cable

In addition to its powerful cleaning capabilities, the Sigma can also be set using the built-in weekly scheduler to automatically clean your pool on a daily, 2x per week, or 3x per week basis. Finally, suppose you need to quickly spot-clean any areas of your pool that may have gotten dirty in between scheduled cleaning sessions. In that case, you can connect your Sigma directly to your smartphone and take advantage of its powerful cleaning abilities at any time via Bluetooth technology.

It also features easy access to the top-load filter, which makes debris removal and cleaning quick and convenient. In addition, the energy saver function reduces water, chemical, and energy usage with every pool cleaning, making it an environmentally-friendly option for maintaining your pool. This machine is also incredibly easy to set up and use; all you need to do is plug it in, drop it into your pool, and let it go. Overall, the Dolphin Sigma offers superior performance, convenience, and efficiency, making it one of the best options for cleaning your swimming pool.

User experiences and complaints

The user experiences with the Dolphin Sigma robot pool cleaner have been overwhelmingly positive. With more than 700 verified Amazon reviews, this robotic pool cleaner has achieved a stellar rating of 4.4 out of 5, highlighting its exceptional performance and outstanding usability. 

Dolphin Sigma working

In general, users were very pleased with how effective and efficient the robot is when it comes to cleaning even the most challenging pools. For example, many users reported that Sigma effectively removed stubborn dirt, debris, and algae from their pools without any problems or issues. However, some users did encounter a few minor difficulties with this robot. 

For instance, those who live in areas where there are lots of leaves found that the Dolphin Sigma was not as effective at removing these materials from their pools as other robots might be. Additionally, some users experienced that the robot can get hung up on the main drain depending on its structure; however, this is not specific to this robot since many people experience this issue with other robots as well. 

Despite these negatives, though, most people were highly satisfied with their purchase and would recommend this robotic pool cleaner to anyone looking for a reliable and powerful device for keeping their pools clean and tidy.

Common questions

Does it pick up leaves?

  • Yes, it is doing a good job picking up leaves.

Does it work on different-shaped pools?

  • Yes, it works on any shape of pools.

Do you need to brush the pool or scrub the walls of the pool?

  • It can clean dirty pools; it climbs and cleans the walls, so you don’t really have to brush the walls or not very often.

Does it come with a caddy?

  • Unfortunately, not.


The Dolphin Sigma robot pool cleaner is an incredibly easy-to-use and reliable device that is perfect for keeping your pool sparkling clean. To maintain this high-quality pool cleaner, you must clean the filters and the robot itself after each pool cleaning session. This can be quickly done in just a few minutes. 

Sigma filter

When not using your pool cleaner, simply find a place to store it so it will not get damaged or tangled with other debris. You can leave it underwater, but I wouldn’t recommend it for a longer period because keeping it in a dry place can help the robot cleaner function better for years to come.

Overall, the maintenance requirements of this top-of-the-line robot pool cleaner are simple, making it an excellent choice for busy homeowners who want peace of mind when it comes to their pool maintenance needs.

Should you get the Maytronics Dolphin Sigma robot pool cleaner?

If you are considering getting a Dolphin Sigma robotic pool cleaner to help keep your pool looking its best, this model will remove all sorts of small debris and dirt from your pool, making it much easier to maintain. The waterline scrubbing on vertical surfaces and the wall climbing abilities help the cleaner get into even the tightest spots. 

Sigma cleaning

However, while this model is great at handling everyday cleaning tasks, it does not seem well-suited for large amounts of leaves. If you live in a place with many leaves, this may not be your best choice. But overall, I would say that the Dolphin Sigma is one of the most effective robotic pool cleaners on the market today. So if you are looking to keep your pool clean and well-maintained, then this might be just the thing for you.

There are multiple reasons why this type of pool cleaning technology can be beneficial. For one, it saves you the time and effort that would otherwise be spent on regular pool maintenance. Rather than employing someone to clean your pool or spending hours each week doing it yourself, you can simply let a robot do the work for you. This saves time and reduces costly upkeep expenses over time, making it a solid investment for those who value their time. 

Dolphin Sigma cleaning

Additionally, having a robotic cleaner takes much of the burden and hassle out of maintaining a swimming pool. Between purchasing chemicals and filters and scrubbing down their surfaces, pools require consistent attention to stay clean, safe, and enjoyable. A Sigma robot cleans automatically, reducing stress and allowing you to focus on the things that really matter. Ultimately, whether or not you should get one depends on your individual priorities, needs, and budget. Plus the Dolphin Sigma robotic pool cleaner with Bluetooth connectivity allows you to have full control over your device, so if you value your time, getting one is 100% worth it


If you want a high-end pool cleaner that will be one of the best solutions for keeping your pool clean, you should definitely check the Dolphin Sigma. While there are many alternatives online( such as the dolphin nautilus cc plus, the dolphin m600, the dolphin premier, and others), this is certainly an excellent choice for those who want to keep their pool crystal clear.

Dolphin Sigma from the box

With its advanced technology and smart design, the Dolphin Sigma robotic pool cleaner quickly and effectively scrubs away dirt and debris while also filtering out harmful substances. And despite the price tag of this pool cleaner, it is still much more affordable than paying someone to do the cleaning for you. So if you want peace of mind knowing that your investment in your pool is being taken care of properly, look no further than the Sigma. It truly is the best choice for an easy and convenient pool experience.

Subscribe to our newsletter and get
the latest robot releases and news.
Scroll to Top