Dolphin (Maytronics) Nautilus EON 120d vs Polaris VRX iQ+
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 VRX iQ+ costs $1,499, so the Dolphin (Maytronics) Nautilus EON 120d is $300 cheaper. Pick the Dolphin (Maytronics) Nautilus EON 120d for fine dirt and sun ledges. Pick the Polaris VRX iQ+ for in-ground pools wanting top cleaning.
- 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
- Corded
- Runtime
- 2 h 45 min deep clean
- Max pool
- 60 ft long
One of the best performing corded robots in independent testing, with an app, scheduling and a lift system that brings it to the wall for pickup. PCWorld found it fast and nearly perfect on the floor, but the 70 ft cord and big caddy take effort to manage. Skip it if you have an above-ground pool or want surface skimming.
Full Polaris VRX iQ+ review →Side by side
| Dolphin (Maytronics) Nautilus EON 120d | Polaris VRX iQ+ | |
|---|---|---|
| Price | $1,199 | $1,499 |
| 3 year cost | $1,199 | $1,649 |
| Our score | Not scored yet | Not scored yet |
| Rank in Pool | #11 | #14 |
| Status | on sale | on sale |
| Warranty | 1 year (Nautilus EON 120d listing) | 2 year limited |
| Pool types | In-ground and above-ground; rectangular, round, free form, kidney | In-ground, up to 60 ft (Leslie's listing) |
| Cleans | Floor, walls, waterline, steps, sun ledges as shallow as 8 in, corners | Floor, walls, waterline; no surface skimming |
| Power | Cordless, lithium-ion (capacity not published) | Corded, 70 ft floating cable with swivel; plugs into a GFCI outlet |
| 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 | SMART Cycle sets time; PCWorld measured 2 h 45 min deep clean, 1 h 15 min floor only, 45 min waterline only |
| Charge time | n/a | None (corded) |
| Filter | DebrisLock ultra fine backwash filter, top access | 5 L illuminated canister with dirty canister indicator; sand and silt canister sold separately |
| Max pool size | Pools up to 50 ft long | In-ground pools up to 60 ft (Leslie's) |
| App | Maytronics One app for scheduling, monitoring and alerts | iAquaLink app with scheduling, remote control, spot cleaning and OTA updates |
| Weight | 24.255 lb | n/a |
| Warranty | 1 year on the Nautilus listing (3 years on the store exclusive EON 120d listing) | 2 year limited (Leslie's) |
| Drive | n/a | 4WD with front brushes |
| Best for | fine dirt and sun ledges | in-ground pools wanting top cleaning |
| Skip if | you hate fiddly filter cleaning | you hate managing a cord |
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 VRX iQ+
- PCWorld: Best corded pick; found 99% of synthetic leaves, missing one on a step, and was one of the fastest robots tested. Managing the power cord took extra effort. 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 VRX iQ+
Pros
- Best performance PCWorld has tested
- Smart cycle adjusts time to your pool
- Lift system for easier retrieval
- App scheduling and remote control
Cons
- Cord and caddy are bulky
- In-ground only
- No surface skimming
- No brand or Amazon price confirmed
Questions buyers ask
Which is better, the Dolphin (Maytronics) Nautilus EON 120d or the Polaris VRX iQ+?
Pick the Dolphin (Maytronics) Nautilus EON 120d for fine dirt and sun ledges. Pick the Polaris VRX iQ+ for in-ground pools wanting top cleaning.
Which is cheaper?
The Dolphin (Maytronics) Nautilus EON 120d at $1,199, versus $1,499 for the Polaris VRX iQ+, checked Oct 26, 2026. Over 3 years with running costs: $1,199 vs $1,649.
What is the difference between the Nautilus EON 120d and the VRX iQ+?
Pool types: In-ground and above-ground; rectangular, round, free form, kidney on the Nautilus EON 120d, In-ground, up to 60 ft (Leslie's listing) on the VRX iQ+. Cleans: Floor, walls, waterline, steps, sun ledges as shallow as 8 in, corners on the Nautilus EON 120d, Floor, walls, waterline; no surface skimming on the VRX iQ+. Power: Cordless, lithium-ion (capacity not published) on the Nautilus EON 120d, Corded, 70 ft floating cable with swivel; plugs into a GFCI outlet on the VRX iQ+.
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