Dolphin M400

Maytronics Dolphin m400 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

Robot pool cleaners are the next step in keeping your pool crystal clear. The Dolphin m400 pool cleaner is one of Maytronics’ high-end products packed with useful features to help you maintain your pool with minimum effort.

dolphin m400 cleaning

The Dolphin m400 is an advanced robot pool cleaner that is easy to use that saves you time, money, and energy, especially in the long run. Maytronics is one of the best when it comes to robot pool cleaners; they know exactly what you need to keep your pool free of debris and other nasty things. Drop your robot cleaner in your pool, let the magic happen, and when you return, there you have it, a sparkling clean pool.

Pros and cons

The Dolphin m400 robot pool cleaner is a popular choice among those looking for an energy-efficient and effective way to clean their pools. While it does have some drawbacks, such as its high price point and less effective cleaning on curved surfaces (reported by users), it also has many advantages, including its ease of use and smart control options via mobile app. Overall, the Dolphin m400 robot pool cleaner is a valuable tool for any homeowner looking to save money on water, chemicals, and energy while keeping their pools clean and sanitary.

The features of the Dolphin m400

the Dolphin m400

The easy solution for your pool cleaning habits.

The Dolphin m400 robot pool cleaner is an advanced cleaning device that is designed to make pool maintenance quick and easy. With its Plug’n’Play feature, the m400 simply needs to be plugged in and dropped into the pool for a hassle-free clean. And thanks to its Easy Access Filter, even debris removal and cleaning are made simple and convenient. Additionally, the m400 offers smart control options via the MyDolphin Plus mobile app, so you can easily monitor and operate your cleaner from anywhere.

Save your time, energy, and the environment.

dolphin m400 underwater

The Dolphin m400 robot pool cleaner is designed to provide efficient, comprehensive cleaning for your pool. This robot features waterline scrubbing capabilities, allowing it to remove deposits and other buildups from vertical surfaces effectively. Additionally, the Dolphin m400 can be customized according to your schedule to specify the precise days and times when it will run for optimal efficiency.

In addition, this robotic cleaner helps reduce water, chemical, and energy usage with every cleaning cycle, making it an efficient and cost-effective choice for any pool owner. So if you’re looking for an advanced pool cleaner with all the features you need to keep your pool looking great, you should check out the Dolphin m400! With its impressive array of features, it will leave you with a clean pool and peace of mind.

Keep your pools clean with minimum effort.

This smart robot is designed to deliver deep and precise cleaning. It features three different brushes for scrubbing and filtering, as well as super-scrubbing power to pick up even the finest debris. In addition, its tangle-free swivel allows it to move freely around the pool without getting stuck. The m400 also comes with a convenient scheduling feature, allowing you to set weekly cleaning times that fit seamlessly into your busy schedule.

Plus, with the MyDolphin app, you can easily spot-clean any areas of your pool that require extra attention. Overall, the m400 is an excellent choice for anyone looking for an effective and reliable robotic pool cleaner. With its long-lasting 36-month warranty, you can feel confident in your purchase and enjoy many years of refreshingly clean pools.

User experiences

maytronics dolphin m400

The overall score is 4 out of 5. Most people are happy with the performance of the Dolphin m400; however, a few reported minor issues. The bad experiences come from the fact that the Dolphin m400 is not the best when it comes to curved shape pools. Additionally, some people used the m400 for a longer time and had leaf clog issues. However, every robot pool cleaner can have this problem after some time because it requires maintenance or even service, especially if you use it frequently. Also, these robots have consumable parts which may require replacement over time.

If you want to keep your pool cleaner in good shape and in its best working condition for a long time, you need to take care of it by cleaning it when needed and changing the consumable parts after a while. This way, you can ensure that your pool cleaner will serve you for a long time.

The app

dolphin m400 app

The Dolphin m400 robot pool cleaner app is one of the best pool cleaning apps around. With the easy-to-use interface, you can quickly set up schedules for your robot to clean your pool automatically on various days of the week. For example, you can set it to clean just the floor of your pool on Mondays and only the walls and waterline on Tuesdays.

Plus, if you need to move your m400 to a different area of your pool, the manual navigation function makes it simple to do so. Overall, this is a must-have tool for anyone with a Dolphin m400 robot pool cleaner. Whether you’re looking for an easy way to keep your pool clean or want to take some extra tasks off your plate, this app does not disappoint!


This unit uses clever-clean technology, which means that it scans the entire pool and creates an optimal cleaning route that ensures no spots are missed, and no areas are overly prioritized. In addition, the m400 has a built-in gyroscope that provides several benefits. For one, it helps the unit determine where it is in the pool at all times, making navigating into tight spots much easier.

The gyroscope also measures orientation and helps the m400 navigate into areas of the pool that are typically hard to reach or clean adequately, such as corners or deep water lines at the bottom of the pool. Overall, the m400 has very strong cleaning power, making it a top choice for many pool owners who want to keep their pools pristine and free of debris at all times.

m400 underwater

One of the best features of this model is its easy-to-clean and empty filter cartridges. Unlike many other robotic pool cleaners, the filters in the m400 are designed to be quickly emptied and cleaned by hand, making it a breeze to keep your pool clean and clear. However, while these filters are appreciated for their ease of use, they could definitely use some improvement in terms of capacity. With its relatively small filter cartridges, the m400 just can’t handle heavy leaf buildup, meaning that you’ll often have to empty and clean them multiple times during a single cleaning job.

If you have a lot of leaves or other debris in your pool area, you may want to consider investing in a model with larger filter capacities, such as the Dolphin Premier.


Dolphin m400 filters

The Dolphin m400 robot pool cleaner is incredibly easy-to-use and maintain. You only need to take care of a few things, and your robot pool cleaner will work perfectly. You must clean the filters regularly and ensure that your pool cleaner is stored correctly when not in use. If you pay attention to these simple things, you can ensure that your pool cleaner will work for a long time.

Should you get the Dolphin m400?

Dolphin m400 from the box

Whether you should or shouldn’t get the Dolphin m400 robot pool cleaner is a question that ultimately comes down to your specific needs and budget. While this device certainly has its pros, such as excellent cleaning performance and top-notch features, it is also relatively expensive compared to other options on the market. Additionally, if you have trouble with excessive leaf buildup in your pool, the Dolphin m400 may not be the best option, as its filters aren’t as large as those offered by some other models.

Also, it is important to note that this particular model is not the newest on the market. Nonetheless, this doesn’t change the fact that it is still a reliable pool cleaner.

While there are certainly some downsides to this particular pool cleaner, it still presents a decent investment for anyone looking for an effective machine that can keep their pool clean and well-maintained. Ultimately, whether you decide to purchase the Dolphin m400 will depend on your individual preferences and budget constraints. The Dolphin Sigma the Premier, and the Nautilus CC plus come at lower price points, so you should definitely check those out as well. Weigh the pros and cons, and decide whether this unit is right for you.


It has great features, excellent cleaning capabilities, a weekly schedule feature, app control, and other great features. Overall, it is a great robot pool cleaner that can save you time, money, and energy. Before buying, you should also check out other models and the difference in price and performance to see what is best for you. The biggest downside to this model is probably its price. However, if you purchase this model, you will most likely be satisfied with its performance. 

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