Dolphin Sigma versus Dolphin Cayman

Head-to-Head Review and Comparison

Dolphin Sigma

Dolphin Sigma Robotic Pool Cleaner

Best Price
$1497
Dolphin Cayman

Dolphin Cayman Robotic Pool Cleaner

Best Price
$747
Pool Type In Ground
Waterline Cleaning Excellent  
Filter Excellent  
Coverage Excellent  
User Experience Excellent  
Warranty Excellent Tied
Pool Type In Ground
Waterline Cleaning Very Good  
Filter Very Good  
Coverage Very Good  
User Experience Very Good  
Warranty Excellent  
Check mark Highs

Most Advanced Dolphin Ever - Lots of Tech

Gyroscope Technology

Multiple Filter Options

Quad Scrubbing Brushes - 4X Cleaning Power

3 Commercial Grade, Efficient Motors

X icon Lows

Pricey, but Fantastic Value

No Filter Bag

Check mark Highs

Great Value Cleaner - Covers floors and walls

Same performance, but cheaper than several other top cleaners

Easy-to-clean oversized filter basket

Programmable Smart Timer - Set the Cayman to run every day automatically

2 Year Warranty - Full Coverage that isn't Prorated

X icon Lows

No waterline cleaning, but has full wall coverage

Only 1 filter option - Standard Filter Basket

Doesn't have waterline cleaning, but for this price, it is understandable

Doesn't have an anti-tangle swivel


Robot Features:

Features


Waterline / Tileline Cleaning

Clean where other robots can't.

90% of the bacteria in your pool is on the waterline. Don't get confused with robots that are "Wall Climbing". There is a big difference. Waterline cleaning means the actively scrubs and sticks to the waterline scrubbing away this problem area in the pool. It is a feature you don't want to miss.

Sigma

Checkmark icon

Cayman

X icon

Dolphin Wall Climbing

Wall Climbing

Provides floor and wall coverage

Wall climbing allows the robot to clean and climb the walls of your pool. However, don't get this confused with waterline cleaning. A robot without waterline cleaning will only clean the walls of your pool. It will miss the dirtest part of your pool, the waterline, where 90% of all algae and bacteria is in your pool. Make sure to check out waterline cleaning units here waterline cleaning robots

Sigma

Checkmark icon

Cayman

Checkmark icon

SmartPhone App

Control the from anywhere.

With its SmartPhone App, you can schedule cleanings, manually control, and fine tune your .

Sigma

Checkmark icon

Cayman

X icon

 Gyroscope

Gyroscope

Gyroscopic Sensors allow the to Navigate Your Pool With Ease

Gyroscopes detect the orientation of the robot by measuring linear acceleration and the angular rotational velocity. The advanced sensors monitor and control position, orientation, direction, and rotation. The 's gyroscope sensors provides constant, precise information to the microprocessor for more effective cleaning coverage, superior climbing and wall/waterline cleaning.

Sigma

Checkmark icon

Cayman

X icon

Anti-Tangle Swivel

Anti-Tangle Swivel

No more tangled cords.

With an Anti-tangle Swivel, the can fully explore and clean your pool without ever getting stuck. The innovative design allows the robot to move freely 360 degrees around your pool, without ever knotting the cord.

Sigma

Checkmark icon

Cayman

X icon

Energy Saver

Ultra Efficient

Save Hundreds of Dollars Cleaning Your Pool a Year!

A robotic pool cleaner saves hundreds of dollars a year in energy when compared to pressure-side or suction-side cleaners. Powered by energy efficient DC motors, a robotic pool cleaner can be 90% more efficient than its pressure-side and suction-side counterparts.

Sigma

Checkmark icon

Cayman

Checkmark icon

Plug and Play

Plug and Play

Simply Plug in and start cleaning!

Set up has never been easier. No installation needed. is ready to go right out of the box. No extra pumps, plumbing, or anything else needed. Simply plug and start cleaning!

Sigma

Checkmark icon

Cayman

Checkmark icon

Smart Navigation

Precise Navigation

Navigate Any Obstacle

This technology ensures that the most effecient route is used to clean your pool floor. So smart, the system automatically navigates around obstacles and quickly returns to its route. You'll want to look for the SmartNav, as we found it performed best in our testing.

Sigma

SmartNav 3.0

Cayman

SmartNav 2.0


Pool Attributes

Specifications

Robot Dolphin Sigma Dolphin Sigma Dolphin Cayman Dolphin Cayman
Pool Types In Ground In Ground
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
Cleaning
Waterline Cleaning Yes No
Number of Filters Included 2 1
Filter Cleaning Ultra-fine and Standard Filter Cartridge sets Filter Basket
Cleaning Coverage Floor, Walls, Waterline Floor, Walls
Cleaning Cycle(s) 2.5 hrs 1.5 hrs
Number of Brushes 4 1
Connectivity & Automation
Remote operation Yes - Through App No
WiFi / Bluetooth WiFi: Yes
Bluetooth: Yes
WiFi: No
Bluetooth: No
Smartphone App Yes No
Automated Weekly Timer Yes Yes
Other
Full Bag Indicator Yes No
Cable Length 60 ft 50 ft
Anti-Tangling Swivel Yes No
Restocking Fee No
No Restocking Fee Ever.
No
No Restocking Fee Ever.
Warranty 3 Years 2 Years
Caddy Included Optional Caddies Available Optional Caddies Available
Official Website Sigma Official Site Cayman Official Site
Official Dolphin Sigma Comparison Page Dolphin Cayman vs Dolphin Sigma
Part Number 99991036-SPLI 99996135-SPL
ASIN B07CZ1XVZX B07TMRFS4H

Customer Reviews

Sigma Robotic Icon
5 stars 4.9 Based on 693 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
How would you rate Dolphin Sigma?*
Write Your Review on Dolphin Sigma
Cayman Robotic Icon
4 and half stars 4.6 Based on 55 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
How would you rate Dolphin Cayman?*
Write Your Review on Dolphin Cayman
Pool & Shop

Where To Buy

Seller Buy From Robot Shop Online
Buy on Amazon.com $1547 Sigma Shop At Amazon
Poolbots Logo $1497 Sigma Shop At Poolbots
PoolRobots Logo $1497 Sigma Shop At PoolRobots
Buy on Amazon.com $799 Cayman Shop At Amazon
Poolbots Logo $747 Cayman Shop At Poolbots
PoolRobots Logo $747 Cayman Shop At PoolRobots

Robot Accessories:

Accessories

Terra Caddy for Dolphin Pool Robots

Terra Caddy

The Must-Have Accessory

Weather and UV-Resistant. Terra Caddy is the go-to Dolphin Caddy. Sealed and protected, the Terra Caddy is covered in a protect resin that cures to an extremely hard layer, making it resistant to scratches and weathering. The resin cures very hard, making it solvent-resistant and scratch-resistant. This level of protection makes the Terra Caddy stand up to rain, sunshine, termites, and more.


Dolphin Universal Caddy

Dolphin Caddy

Easy Transport and Cheap

A robotic pool cleaner is an investment, so make sure to protect it. The Dolphin Universal Caddy is a solid caddy that gets the job done. Easily store and transport your robotic pool cleaner to keep it lasting for years to come.


Dolphin Replacement Parts

Replacement Parts

Need extra filters, replacement power supply, or new climbing rings?

Looking for replacement parts? Well, you've come to the right place. Shop all replacement parts for the and all other models.


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