Dolphin (Maytronics) Nautilus EON 120d vs Polaris FREEDOM
Researched by Riley Hart · prices checked Oct 26, 2026
As of Oct 26, 2026, the Dolphin (Maytronics) Nautilus EON 120d costs $1,199 and the Polaris FREEDOM costs $1,199. Pick the Dolphin (Maytronics) Nautilus EON 120d for fine dirt and sun ledges. Pick the Polaris FREEDOM for in-ground pools up to 50 ft without a cord.
- Cleans
- Floor
- Power
- Cordless
- Runtime
- 1.5 to 2.5 h cycles
- Max pool
- 50 ft long
A good fit for cordless buyers who care most about trapping fine dirt and want a robot that reaches 8 inch sun ledges. PCWorld found its filter caught debris very well but was a real chore to empty, and it sometimes missed corners and leaves on steps. Check the warranty, which is only 1 year on the Nautilus listing.
Full Dolphin (Maytronics) Nautilus EON 120d review →- Cleans
- Floor
- Power
- Cordless lithium ion
- Runtime
- Up to 2.5 h
- Max pool
- Up to 50 ft
The base cordless Polaris cleans floor, walls and waterline in about 2.5 hours and parks for retrieval with Tap and Lift. The Pool Nerd ranks it as a saner cordless pick than no name robots, but notes suction fades as the battery drains. It costs a lot for a cordless robot without a remote.
Full Polaris FREEDOM review →Side by side
| Dolphin (Maytronics) Nautilus EON 120d | Polaris FREEDOM | |
|---|---|---|
| Price | $1,199 | $1,199 |
| 3 year cost | $1,199 | $1,199 |
| Our score | Not scored yet | Not scored yet |
| Rank in Pool | #11 | #12 |
| Status | on sale | on sale |
| Warranty | 1 year (Nautilus EON 120d listing) | 2 years limited |
| Pool types | In-ground and above-ground; rectangular, round, free form, kidney | In-ground only |
| Cleans | Floor, walls, waterline, steps, sun ledges as shallow as 8 in, corners | Floor, walls and waterline; floor only and waterline only modes |
| Power | Cordless, lithium-ion (capacity not published) | Cordless lithium ion |
| Runtime | Cycles of 1.5, 2 or 2.5 h; Maytronics blog claims up to 4 h per charge; UltraRun short cycles claimed to last up to 2.5 weeks per charge | Up to 2.5 h |
| Charge time | n/a | 4 h per Leslie's; under 5 h per Polaris |
| Filter | DebrisLock ultra fine backwash filter, top access | 4 L transparent all purpose filter canister |
| Max pool size | Pools up to 50 ft long | Up to 50 ft |
| App | Maytronics One app for scheduling, monitoring and alerts | iAquaLink app for modes, charge status and cycle alerts |
| Weight | 24.255 lb | 20 lb |
| Warranty | 1 year on the Nautilus listing (3 years on the store exclusive EON 120d listing) | 2 years limited |
| Best for | fine dirt and sun ledges | in-ground pools up to 50 ft without a cord |
| Skip if | you hate fiddly filter cleaning | you want corded level suction |
Specs are maker claims unless a reviewer is named. Prices from the stores we link, checked daily.
What reviewers found
Dolphin (Maytronics) Nautilus EON 120d
- PCWorld: Tested the EON 120d: DebrisLock filter trapped all types of debris and coverage reached about 95% on the longest cycle, but emptying the filter was a huge pain, it missed corners, failed to start twice at first, and often flipped onto its back. Source
- The Pool Nerd: Notes the EON line cleans water as shallow as about 8 in with better than basic mesh filtering, but still requires hooking, lifting, drying and charging; Clicker retrieval is mentioned for the 120d. Source
Polaris FREEDOM
- The Pool Nerd: Named it the runner up cordless pick with longer runtime than many cordless units and wall climbing, but said suction and scrubbing fade as the battery drains and it does not match corded Dolphins. Source
Pros and cons
Dolphin (Maytronics) Nautilus EON 120d
Pros
- Very effective fine debris filter per PCWorld
- Cleans ledges as shallow as 8 in
- App scheduling with UltraRun short cycles
- Handled stairs well in testing
Cons
- Filter is hard to empty per PCWorld
- Missed corners and some step leaves
- Battery size and charge time not published
- 1 year warranty on the Nautilus version
Polaris FREEDOM
Pros
- Cleans floor to waterline
- Big 4 L clear canister
- Backed by a long running pool brand
- iAquaLink app modes and alerts
Cons
- Expensive for cordless
- Suction fades as the battery drains per The Pool Nerd
- Larger pools may need extra cycles
- Leslie's lists it for AccuBlue members only
Questions buyers ask
Which is better, the Dolphin (Maytronics) Nautilus EON 120d or the Polaris FREEDOM?
Pick the Dolphin (Maytronics) Nautilus EON 120d for fine dirt and sun ledges. Pick the Polaris FREEDOM for in-ground pools up to 50 ft without a cord.
What is the difference between the Nautilus EON 120d and the FREEDOM?
Pool types: In-ground and above-ground; rectangular, round, free form, kidney on the Nautilus EON 120d, In-ground only on the FREEDOM. Cleans: Floor, walls, waterline, steps, sun ledges as shallow as 8 in, corners on the Nautilus EON 120d, Floor, walls and waterline; floor only and waterline only modes on the FREEDOM. Power: Cordless, lithium-ion (capacity not published) on the Nautilus EON 120d, Cordless lithium ion on the FREEDOM.
Also consider
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