Polaris 9550 Sport
#14 in CordedFull review
A heavy-duty corded Polaris for large in-ground pools, if you can find it from a reliable seller.
Walmart $999$999
The Polaris 9550 Sport and the Dolphin Nautilus CC Plus are evenly matched, rated 3.6 and 3.5. The Dolphin Nautilus CC Plus wins on value. The Dolphin Nautilus CC Plus costs $170 less ($829 vs $999).
Dolphin Nautilus CC Plus
#18 in CordedFull review
A simple plug-and-go robot for mid-size in-ground pools whose owners want a swivel cable but no app.
Amazon $829 Maytronics $829$829
Prices were last checked October 21, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Dolphin Nautilus CC Plus for value ($829 vs $999).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every corded robotic pool cleaner; a clear win is highlighted. How we rank explains each one.
| Factor weight | Polaris 9550 Sport | Dolphin Nautilus CC Plus |
|---|---|---|
| Overall rating | 3.6/5 | 3.5/5 |
| Value 25% | 40 $999 | 48 $829 |
| Cleaning 25% | 85 Floor, walls and waterline | 60 Floor and walls (waterline not stated) |
| Navigation 15% | 50 Sensor-based | 50 navigation not published (neutral score used) |
| Warranty 15% | 50 warranty not published (neutral score used) | 50 warranty not published (neutral score used) |
| Pool size 10% | 50 pool size not published (neutral score used) | 100 pools up to 50 ft long (about 1,250 sq ft) |
| Features 10% | 75 3 of 4; no app control | 50 too few features published (neutral score used) |
Specifications
| Polaris 9550 Sport | Dolphin Nautilus CC Plus | |
|---|---|---|
| Pool | ||
| Pool size (rated) | - | Up to 50 ft long |
| Pool types | In-ground | In-ground |
| Cleaning | ||
| Cleans | Floor, walls and waterline | Floor and walls |
| Surface skimming | No | No |
| Filter | 5 L canister with dirty-canister indicator | Top-load filter basket |
| Filter capacity | 5 L | - |
| Power | ||
| Power | Corded, 70 ft cable | Corded |
| Run time | - | Longest cycle 2 h |
| Swivel cable | Yes | Yes |
| Navigation & app | ||
| Navigation | Sensor-based | - |
| App | No | - |
| Scheduling | Yes | - |
| Retrieval | Easy Lift System | - |
| Caddy included | Yes | - |