# Beatbot AquaSense 2 Ultra vs Dolphin (Maytronics) Sigma

As of Oct 26, 2026, the Beatbot AquaSense 2 Ultra costs $2,299 and the Dolphin (Maytronics) Sigma costs $2,999, so the Beatbot AquaSense 2 Ultra is $700 cheaper. Pick the Beatbot AquaSense 2 Ultra for large pools with surface debris. Pick the Dolphin (Maytronics) Sigma for set and forget in-ground pools.

Prices checked Oct 26, 2026. HTML version: https://robotsforthat.com/vs/beatbot-aquasense-2-ultra-vs-dolphin-sigma/

## Side by side

| | Beatbot AquaSense 2 Ultra | Dolphin (Maytronics) Sigma |
|---|---|---|
| Price | $2,299 | $2,999 |
| 3 year cost | $2,299 | $3,099 |
| Our score | Not scored yet | Not scored yet |
| Rank in Pool | #16 | #17 |
| Status | on sale | on sale |
| Warranty | 3 years full replacement | 3 years |
| Pool types | In-ground and above-ground; concrete, vinyl, fiberglass, tile, stainless steel; saltwater under 5,000 ppm; depth 1.31 to 9.84 ft | In-ground; rectangular, round, free shape, kidney |
| Cleans | Floor, walls, waterline, water surface, plus water clarification | Floor, walls, waterline |
| Power | Cordless, 13,400 mAh lithium-ion | Corded |
| Runtime | Up to 10 h surface, 5 h floor, 4.5 h walls and waterline (maker claim) | Default 2.5 h cycle; no battery |
| Charge time | About 4.5 h | None (corded) |
| Filter | Two layer 150 µm and 250 µm, dual baskets of 4.0 L and 3.7 L | Extra large multi layer top load basket; fine filter plus ultra fine kit in box |
| Max pool size | Maker lists 3,444 sq ft per cycle in its FAQ and 3,875 sq ft pool floor in its spec table | Pools up to 50 ft long |
| App | Beatbot app over Wi-Fi or Bluetooth; AI camera mapping with 27 sensors; app works only when robot is at the surface | MyDolphin Plus app over Wi-Fi with scheduling and automation |
| Weight | 29.1 lb | 24.63 lb |
| Warranty | 3 years | 3 years |
| Suction | n/a | 4,500 gph (maker) |
| Timer | n/a | Weekly timer |
| Best for | large pools with surface debris | set and forget in-ground pools |
| Skip if | you want to lift under 20 lb | you do not care about app control |

## What reviewers found

### Beatbot AquaSense 2 Ultra

- Reviewed: Did an excellent job on bottom and sides and left clear water, but could not clean the shallow tanning area or Baja shelf, lost Wi-Fi underwater, and its near 30 lb weight was hard to haul. [Source](https://reviewed.com/home-outdoors/content/beatbot-aquasense-ultra-2-review)
- Android Authority: Editor's Choice; pulled more debris, including small rocks, from an already clean pool than other robots tested. Downsides were bulk, price, and one failed charge due to wet contacts. [Source](https://androidauthority.com/beatbot-aquasense-2-ultra-review-3545525)
- The Pool Nerd: Named best cordless pick in its 2026 roundup but still labeled it Pool Nerd Disapproved, citing mesh filtration at flagship price and the daily charge and haul routine. The site prefers corded robots and earns affiliate commissions. [Source](https://www.thepoolnerd.com/best-cordless-robotic-pool-cleaners)

### Dolphin (Maytronics) Sigma

- The Pool Nerd: Ranked it the best robot the site has tested; the center brush rolled over the main drain every time in weeks of daily testing and its waterline cleaning was the strongest of any Dolphin tried. Affiliate site with links to Dolphin dealers. [Source](https://www.thepoolnerd.com/dolphin-sigma-review)

## Questions buyers ask

### Which is better, the Beatbot AquaSense 2 Ultra or the Dolphin (Maytronics) Sigma?

Pick the Beatbot AquaSense 2 Ultra for large pools with surface debris. Pick the Dolphin (Maytronics) Sigma for set and forget in-ground pools.

### Which is cheaper?

The Beatbot AquaSense 2 Ultra at $2,299, versus $2,999 for the Dolphin (Maytronics) Sigma, checked Oct 26, 2026. Over 3 years with running costs: $2,299 vs $3,099.

### What is the difference between the AquaSense 2 Ultra and the Sigma?

Pool types: In-ground and above-ground; concrete, vinyl, fiberglass, tile, stainless steel… on the AquaSense 2 Ultra, In-ground; rectangular, round, free shape, kidney on the Sigma. Cleans: Floor, walls, waterline, water surface, plus water clarification on the AquaSense 2 Ultra, Floor, walls, waterline on the Sigma. Power: Cordless, 13,400 mAh lithium-ion on the AquaSense 2 Ultra, Corded on the Sigma.

Full reviews: [Beatbot AquaSense 2 Ultra](https://robotsforthat.com/robot/beatbot-aquasense-2-ultra/index.md), [Dolphin (Maytronics) Sigma](https://robotsforthat.com/robot/dolphin-sigma/index.md)