Here is the thing that should decide your purchase this year, and almost nobody leads with it.
Cleaning performance across mid-range robots is close enough that you would struggle to pick a winner from looking at the pool afterward. We do not take money from any brand, so there is nothing stopping us saying that. What actually separates these machines is what happens in year three — whether the warranty covers it, whether you can buy the part, and whether the filtration suits the debris you actually get.
And on that front, the gap inside Dolphin's own range is wider than the prices suggest.
Key takeaways
- Maytronics lists one year on its Nautilus robots and three on the Premier and Sigma, and retail listings do not always match. Confirm the coverage on the listing you buy from.
- Cleaning performance across mid-range robots is close. Warranty, filtration and parts support are what separate them.
- The Premier and Sigma carry three-year warranties. The Nautilus line does not.
- Multi-media filtration matters if you have trees. Swapping to a leaf bag in fall is genuinely useful.
- Almost every robot failure is a debris jam, a worn brush or a cable fault — not a dead motor.
The warranty situation, first
Dolphin's Nautilus line — the CC, CC Plus and their variants — is where most people start, because it is the affordable end of the range.
Maytronics' own store lists one year on every Nautilus robot it compares, the CC Plus included, and retail listings do not always use that figure: the Pool Warehouse listing linked below advertises a 30-month manufacturer warranty for the same robot. The CC Plus Maytronics sells now is the Wi-Fi version, and its specification table rates it for pools up to 40 feet and says no to waterline scrubbing. Its page sets it against the Premier line by line.
The Premier and Sigma carry three years.
I am not going to tell you the Nautilus is a bad machine, because it is not. But a one-year warranty on a robot that typically fails somewhere in years three to five is a materially different purchase to a three-year one, and the price gap needs to be worth that to you.
Read the warranty on the specific listing you are buying from. Not the review, not the box, not a forum post from 2023. The listing. And keep the receipt somewhere you will find it.
My picks at a glance
- 1
Dolphin Premier
Best overall · most residential pools, especially with trees
- 2
Dolphin Sigma
Best with app control · owners who want app control and a top-load filter
- 3
Polaris VRXIQ+
Best corded alternative · large pools, and anyone already running iAquaLink
- 4
MOVA Diver A10
Best cordless value · skipping the cable without paying flagship money
- 5
Beatbot AquaSense 2
Best cordless · pools where the cord is the thing that annoys you
- 6
Dolphin Nautilus CC Plus
Best budget option · pools up to 40 feet that do not need the waterline cleaned
Beyond these picks, every cleaner with a page here — robotic, pressure-side and suction-side — is listed with its parts and manuals.
The picks
Dolphin Premier
Best for most residential pools, especially with trees
The sweet spot in the Dolphin range. Three-year warranty, pools up to 50 feet, and it cleans the waterline rather than stopping at the walls. Maytronics' current model swaps between a filter bag and cartridges loaded from the bottom, navigates with CleverClean, and runs a weekly schedule from its power supply rather than an app.
Strengths
- Three-year warranty, against one year on the Nautilus line
- Filter bag or cartridges, with a fine filter kit in the box
- Cleans the waterline, not just floor and walls
- Weekly timer on the power supply, no app needed
Trade-offs
- Roughly four times the price of a budget Nautilus
- No app, and no remote in the box
- Bottom-load filter, so the robot turns over to empty it
Dolphin Sigma
Best for owners who want app control and a top-load filter
The Premier's step up, though not in pool size: Maytronics rates both for pools up to 50 feet and gives both the same 4,500 gallons an hour of suction. What the Sigma adds is the MyDolphin Plus app over Wi-Fi and a filter whose cartridges lift out of the top, with an ultra-fine filter kit in the box. Waterline cleaning and the same three-year warranty as the Premier.
Strengths
- MyDolphin Plus app over Wi-Fi, with scheduling
- Top-load cartridges, so no turning the robot over
- Three-year warranty
- Ultra-fine filter kit in the box
Trade-offs
- The most expensive option here by a clear margin
- Overkill on a small, low-debris pool
- More electronics is more that can eventually fail
- Rated for the same 50-foot pools as the Premier
Polaris VRXIQ+
Best for large pools, and anyone already running iAquaLink
Polaris is the biggest name in pool cleaners and belongs in any list of them. Seventy feet of swivel cable, Polaris rates it for in-ground pools up to 60 feet, and if your automation is already iAquaLink the robot runs from the same app. Seven cleaning modes including a smart cycle that sizes the run to the pool. The warranty is two years wherever you buy it, but Polaris does not warrant the brushes, tires or filter canister at all.
Strengths
- 70ft swivel cable reaches the far end of large pools
- iAquaLink control, the same app as Jandy automation
- Large 5-liter debris canister, which matters under trees
- Two-year warranty, with no distinction by where it was bought
Trade-offs
- Premium price, in line with the Dolphins
- App control is only an advantage if you use it
- Has to come out of the pool after every cycle, per Polaris
- Brushes, tires and the filter canister are not warranted
MOVA Diver A10
Best for skipping the cable without paying flagship money
Cordless at a considerably lower price than the premium machines, with up to 240 minutes of runtime — which is the number that actually decides whether a cordless robot suits your pool. MOVA's manual is specific that the four hours is floor-only cleaning; walls and waterline get three. Climbs walls, scrubs the waterline on a double pass, and moves up to 6,000 gallons an hour. The battery cannot be replaced, and MOVA warrants it for one year against two for the robot.
Strengths
- Up to 240 minutes of floor cleaning on a charge
- Substantially cheaper than the flagship cordless robots
- Wall climbing and waterline scrubbing at this price
Trade-offs
- Non-replaceable battery, warranted for one year
- Tracks and brushes are excluded from the warranty
- Runtime drops to three hours on walls and waterline
Beatbot AquaSense 2
Best for pools where the cord is the thing that annoys you
The category the corded robots do not cover. No cord means nothing to tangle, nothing to trip over and no float to position, and it parks itself at the surface when it finishes or runs low so you are not fishing for it. What you trade is runtime: Beatbot gives up to four hours of floor cleaning on a charge, for pool floors up to 3,230 square feet. Beatbot's three-year warranty covers the battery as part of the robot, but its own store sells no replacement parts for the AquaSense 2.
Strengths
- No cord to tangle, and no cord to eventually fail
- Surface parking, so retrieving it is not a job
- Cleans waterline as well as floor and walls
Trade-offs
- Runtime is capped by battery, not by how dirty the pool is
- Beatbot sells no replacement parts for it on its own store
- Refurbished units carry two years of warranty, not three
- Newer brand than Maytronics, with a shorter track record to judge
Dolphin Nautilus CC Plus
Best for pools up to 40 feet that do not need the waterline cleaned
The long-running best-seller, and the one to look at hardest before buying. The CC Plus Maytronics sells now is the Wi-Fi version at $749, a fraction of the Premier's price, with the MyDolphin Plus app. But Maytronics rates it for pools up to 40 feet, cleaning the floor and walls with no waterline scrubbing, and lists a one-year warranty against the Premier's three. Retail listings do not all agree on that year: the one linked here advertises 30 months, so read the terms on the listing you buy from.
Strengths
- Far cheaper than the Premier or Sigma
- MyDolphin Plus app and a weekly timer
- Same 4,500 gph suction rate as the Premier
- Top-access filter with an ultra-fine kit
Trade-offs
- One-year warranty from Maytronics, against three on the Premier
- Rated for 40-foot pools, with no waterline scrubbing
- Fewer filtration options than the Premier
- Street pricing varies enormously between retailers
Why Dolphins dominate the corded picks
Three of the corded picks here are Maytronics machines, and that is worth explaining rather than leaving as an unexplained pattern.
Maytronics has dominated residential robots for a long time, and the reason is repairability as much as cleaning: the motors, the power supplies and the tracks are serviceable, parts are available years later, and independent repair shops know them. A robot is one of the few pool purchases where the second-hand and repair market genuinely matters, because the alternative to a $200 repair is a $1,200 replacement.
The cordless machines are the real challenger, and they are a different product rather than a better one. No cord is a genuine improvement in daily use. A sealed battery that eventually dies and takes the machine with it is a genuine regression in ownership. Which matters more depends on whether you keep equipment for five years or fifteen.
How we scored these
Since these scores are not from hands-on testing, here is exactly what they are built from — all of it published, all of it checkable.
| WeightMy default | Why it carries that weight | |
|---|---|---|
| Warranty length | High | These machines fail in years three to five. Coverage across that window is the single biggest financial variable. |
| Parts availability | High | A robot you cannot get a brush set or drive motor for is disposable, whatever it cost. |
| Filtration options | Medium | Swappable media matters a lot with trees and not at all without them. |
| Coverage | Medium | Waterline and tile-line cleaning is the difference between finishing the job and doing the last bit by hand. |
| Price against feature set | Medium | Judged within the tier, not across it. A budget robot is not marked down for lacking a third motor. |
| Raw cleaning performance | Low | Genuinely close between models. Weighting it heavily would be inventing differences that are not there. |
What actually breaks
From years of opening up failed equipment on repair calls, the order is consistent:
1. Debris jams in the drive train. Something gets past the intake and wraps a drive shaft or wedges in the tracks. A hair tie, a leaf stem, a bit of plastic. Cheap fix if you can open the housing.
2. Cable twist and internal breaks. The cable gets twisted the same direction every cycle until a conductor fatigues. Swivels help. Uncoiling the cable and letting it hang straight in the sun for an hour every few weeks helps more.
3. Worn brushes. Brushes wear out before motors do, and a robot with worn brushes stops climbing walls — which is exactly when people assume the motor is going. Brushes are $30 to $60 and take ten minutes.
4. Power supply failure. The transformer box, not the robot. Often the cheapest part of the whole system, and often the reason a whole unit gets thrown away because nobody diagnosed it.
5. Motor failure. Genuinely last. Most "dead" robots I have opened were one of the four above, which is why it is worth working through the symptom before you condemn a machine.
Which is why parts availability is weighted so heavily. A machine where you can buy a $45 brush set and a $70 motor is a decade-long purchase. A machine where the manufacturer sells nothing is a consumable with a high price tag.
Buying advice
Match the cable to your pool. Measure the diagonal, add the depth, add a few feet for the deck. Too short will not reach the far end; too long tangles.
Ask the seller a direct question: "Can I buy a brush set and a drive motor for this in three years?" The answer, and how readily it comes, tells you a lot.
Top-load filter baskets beat bottom-load. You will empty it after every cycle for years, and not having to flip a wet robot over is worth real money in daily annoyance.
Skip the app unless you genuinely want scheduling. On most models it adds a login and firmware updates to a machine whose job is to drive around a pool.
Do not buy on suction claims. They are unstandardized between brands and essentially meaningless as a comparison.
On cordless: the convenience is real. Before you buy one, ask whether the battery can be replaced when it degrades. On many models it cannot, which caps the machine's life no matter how good the rest of it is. Get the answer in writing.
How hard that is to establish is itself the warning. The Polaris FREEDOM Plus is a good machine, and its parts, battery block included, are in Fluidra's dealer catalog, but its manual's instruction for anything past brushes, tracks and the canister is to call a service center. That is the part of the deal that does not show up in a review of how well it climbs. The MOVA Diver A10's manual answers the battery question plainly: it is non-replaceable.
Beatbot is similar: its US store sells no parts for the AquaSense 2, and its European stores list only a filter basket, though its three-year warranty does cover the battery. A cord does not make a robot owner-serviceable either. The VRX iQ+ has a full parts table in Fluidra's catalog, but its manual names only the brushes, the tires and the filter canister as owner-replaceable.
Care that doubles their life
- Rinse with fresh water every few cycles. Chlorinated water is hard on seals and bearings.
- Empty the basket after every cycle, not when it is full. A full basket makes the motor work harder and the robot stops climbing.
- Store it out of the sun. UV destroys the plastics and the cable jacket faster than anything else.
- Never leave it in the pool between cycles. Constant chlorine exposure kills seals.
- Untwist the cable every few weeks. Lay it out straight and let it relax.
Fifteen minutes a month, and it is the difference between five years and ten. The full service routine covers the procedures behind that list, including the filter cleaning almost everyone does half of.
Go deeperHow we test pool productsOur protocol, what we measure per category, and how a research-based guide becomes a tested one. Go deeperIs a robot even the right type?How robotic cleaners compare with suction and pressure on cost and filtration.Frequently asked questions
What is the best robotic pool cleaner in 2026?
For most residential pools, the Dolphin Premier. It carries a three-year warranty, swaps between a filter bag and cartridges, and cleans the waterline as well as floors and walls. Maytronics lists it at $2,499 direct, but authorized dealers were selling it around $2,000 when we checked in September 2026. If you want app control, the Dolphin Sigma adds the MyDolphin Plus app and a top-load filter on the same warranty and the same 50-foot pool rating, at around $2,400.
What warranty do Dolphin robots carry?
Maytronics lists one year on the Nautilus robots it compares on its own store, the CC Plus included, and three years on the Premier and Sigma. Retail listings do not always use Maytronics' figure, so read the warranty on the specific listing you are buying from, keep the receipt, and register the robot.
Are robotic pool cleaners worth it?
For most pool owners, yes. They cut manual vacuuming to a few times a season and filter independently of your main system, so they work even when the pump is off. The caveat is buying one you can get parts for, because a robot you cannot repair is an expensive disposable item.
How long do robotic pool cleaners last?
Five to ten years for a repairable corded model that gets basic care. The most common failures are debris jams in the drive train, cable damage from twisting, and worn brushes — all inexpensive fixes when parts are available. Motor failure is much rarer than people assume.
Do robotic pool cleaners clean the waterline?
Mid-range models and up do, and it is worth having. The waterline band collects body oils, sunscreen and pollen, and it is the most visible part of the pool. Entry-level models generally handle floors and walls only, so you will still be scrubbing the tile line by hand.
Should I buy a cordless robotic pool cleaner?
Cordless models remove the cable hassle, which is a real convenience. The thing to check before buying any of them is whether the battery can be replaced when it degrades, because on many models it cannot — which caps the machine's usable life regardless of how well the rest of it is built. Ask the seller directly and get the answer in writing.
