Dolphin Sigma versus Dolphin Cayman
Compare Features, Filters, and Warranty
Cayman or Sigma. Which wins?
Diving into the Cayman vs Sigma, our pool experts distinguish the key features you'll want to look for when choosing a pool robot. That way, you can decide between the Dolphin Sigma or Dolphin Cayman.
Sigma's top features...
Includes a Gyroscope
The Most Advanced Robot Ever - Sigma's gyroscopic sensors allow Sigma to clean deeper than any robot before.
Cleans the Waterline
The Dolphin Sigma cleans your entire pool - including the floor, wall, and waterline.
Why Waterline Cleaning is Needed →
Includes NanoFilters™
The included Gen 2 NanoFilters capture smaller debris other cleaners miss.
Why NanoFilters are essential →Cayman's top features...
Includes MaxBin™
The Dolphin Cayman utilizes MaxBin™, an oversized filter basket that is easier to clean and is 50% larger than standard cartridges.
Read About MaxBin™ →Cleans the Wall
The Dolphin Cayman cleans your pool's floor and walls with Active Scrubbing
Why Wall Climbing is Needed →
Includes NanoFilters™
Free with purchase at Poolbots, the Cayman's NanoFilter panels snap in to clean smaller particles other cleaners will miss. Use code: DEEPCLEAN23 at checkout
Why NanoFilters are essential →Compare essential features...
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|---|---|---|
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Sigma | Cayman |
| Cleans Waterline | Yes | No |
| NanoFiltration | Yes | Yes |
| MultiMedia | No |
No |
Leaf Bag | No |
No |
Dual Stabilizer | Yes | No |
Gyroscope | Yes | No |
3 Year Warranty | Yes | No |
| No Restocking Fee | Yes | Yes |
| 30 Day Trial | Yes | Yes |
| Shop Now | Buy | Buy |
Shoppers also looked at... Compare Vs.
Dolphin Premier
Premier adds waterline cleaning, commercial grade motors, MultiMedia™, NanoFilters™, 3 year warranty + 30 Day Free Trial.
Dolphin Quantum
Features waterline cleaning, smart weekly timer, MaxBin™, NanoFilters™, and a 2 year warranty.
Key Differences
Sigma
- Includes NanoFilters™ - Captures small debris other cleaners miss
- Waterline Cleaning - Cleans the pool floor, wall, & waterline
- Triple Commercial Grade Motors - 3 ProLine Motors filter 4500 GPH+
- myDolphin Plus App - Schedule and clean the Sigma from anywhere
- Gyroscope - Gyroscopic sensors control and monitor every movement
- 3 Year Warranty - Longest warranty available
Cayman
- Best Pool Robot Under $800 with NanoFilter™ capability, Weekly Timer, HyperBrush, and Wall Climbing.
- MaxBin™ is larger and easier to clean than filter cartridges
- Wall Climbing - Complete floor and wall coverage
- FREE NanoFilters with purchase using code at checkout: DEEPCLEAN23
- Weekly Timer - Schedule the robot to automatically clean
- HyperBrush - Scrubs 2X the speed of standard Dolphin robots
Compare Dolphin Sigma vs Dolphin Cayman
| Features | Sigma | Cayman |
|---|---|---|
| Standard Filter |  |
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| NanoFilters™ | |
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| Wall Climbing | |
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| Waterline Cleaning | |
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| Programmable Timer | |
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| Gyroscope | |
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| Dual Stabilizer | |
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| Anti-Tangle Swivel | |
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| 3 Year Warranty | |
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Compare Features
NanoFilters™
Often overlooked, having a NanoFilter™ can be the most important part of a pool robot. Without it, small microscopic particulate will pass right through the standard filters found on most robots. These highly advanced filters capture more debris than any other filter on the market, leaving you with a cleaner, happier, and healthier pool.
The Dolphin Sigma includes NanoFilters™
The Dolphin Cayman has optional NanoFilters™
Standard Fine Filter
These standard filters help capture larger items such as small leaves and other debris, while maximizing flow rate. However, if your pool struggles with cloudy pool water, small algae, or sand. You many want to consider a unit with NanoFilters™.
The Dolphin Sigma includes a standard filter.
The Dolphin Cayman includes a standard filter.
Programmable Weekly Timer
An automatic pool cleaner should be automatic, right? With a programmable weekly timer, you can set the robot to clean at different intervals. So your pool robot can clean for you everyday of the week while you sit back and relax - without the need to manually turn it on and off everyday.
The Dolphin Sigma includes a weekly timer.
The Dolphin Cayman includes a weekly timer.
Dual Stabilizer
This essential piece to waterline cleaning allows the unit to cling to the walls of your pool - allowing a more precise and deeper clean at the waterline. Units with dual stabilizers have increased performance and agility while cleaning. It also doubles as an easy handle to pickup your robot from.
The Dolphin Sigma includes a dual stabilizer.
The Dolphin Cayman does not include a dual stabilizer.
Anti-Tangle Cable Swivel
Say goodbye to pesky tangled cords. An anti-tangle swivel allows the robot to move 360 degrees around your pool without the cord getting tangled. So you can sit back and enjoy while your pool robot vacuums and cleans for you.
The Dolphin Sigma includes an anti-tangle swivel.
The Dolphin Cayman does not include an anti-tangle swivel.
3 Year Warranty
A robot is only as important as its warranty. By purchasing through an Authorized Maytronics Dealer such as Poolbots, you'll get the full warranty on all robotic pool cleaners available on Poolbots.com. Try any robotic pool cleaner risk-free for 30 days in your pool without any restocking fees.
The Dolphin Sigma includes a 3 year warranty.
The Dolphin Cayman includes a 2 year warranty.
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Compare Specifications
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| Part Number | 99991036-SPLI | 99996135-SPL |
|---|---|---|
| ASIN | B07CZ1XVZX | B07TMRFS4H |
| Waterline Cleaning | Yes | No |
| Multi-Media® | No | No |
| # of Filters Included: | 2 | 1 |
| Filter Cleaning | Ultra-fine NanoFilters and Standard Filter Cartridge sets | MaxBin |
| Cleaning Coverage | Floor, Walls, Waterline | Floor, Walls |
| Cleaning Cycle | 2.5 hours | 1.5 hours |
| Number of Brushes | 4 | 1 |
| Cable Length | 60 ft | 50 ft |
| Anti-Tangle Swivel | Yes | No |
| Pool Types | In Ground | In Ground & Above Ground |
| Maximum Pool Size | 50 ft | 33 ft |
| Pool Shape | Rectangle, Oval, or Freeform | Rectangle, Oval, or Freeform |
| Obstacles | Steps, Ladder, Drain Cover, Ledges, Pop-Ups | Steps, Ladder, Drain Cover, Ledges, Pop-Ups |
| Surface | Concrete, Plaster, Gunite, Pebble, Tile, Vinyl Liner, Fiberglass | Concrete, Plaster, Gunite, Pebble, Tile, Vinyl Liner, Fiberglass |
| Media-Alert® | No | No |
| Automated Weekly Timer | Yes | Yes |
| Remote operation | Yes - Through App | No |
| Restocking Fee | No |
No |
| Warranty | 3 Years | 2 Years |
| Read Reviews | Dolphin Sigma Review | Dolphin Cayman Review |
View Other Top Comparisons
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Read Our Reviews
Learn more about the Dolphin Sigma and Dolphin Cayman in our reviews. Our in-depth pool robot reviews are written by our pool experts and will help you make an informed decision when purchasing a robotic pool cleaner for your pool. Read the Dolphin Cayman Review, Dolphin Sigma Review, or browser other top robotic pool cleaner reviews.
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WHAT'S NEXT?
Try in your own pool for 30 days.
Every pool deserves an intelligent robot. If you don't love it, simply return the robot. Unlike the other guys, we never charge a restocking fee or any other fees - meaning no restocking fee ever.
