Aiper Seagull SE vs Dolphin Sigma

Introduction

If you're stuck deciding between the Aiper Seagull SE and the Dolphin Sigma, I've run both in my own pool and I can save you some guesswork. These two aren't really in the same weight class, and once you see how each one actually behaves in the water, the gap gets obvious fast.

I bought and tested both units myself, and while each has a personality of its own, the differences in real cleaning performance, filtration, and everyday features are hard to ignore. My full write-ups on each model go deeper if you want the play-by-play, but I'll give you the honest short version here.

The Aiper Seagull SE pulled me in with the cordless pitch. No cable to untangle, no swivel to babysit, just drop it in and walk away. That's the dream. In practice, though, I hit a handful of problems that really cut into how well it cleans. If you want the full breakdown, my Aiper Seagull SE review lays it all out.

The Dolphin Sigma comes at this from the opposite end. It's built on a commercial-grade platform, and it shows the moment you turn it on. Between the beefy motors and the way it covers a pool wall to wall, it just feels like a serious machine. I dig into all of that in my Dolphin Sigma review if you want the details on what makes it tick.

Between the two reviews you'll get my real notes from testing, warts and all. I looked at ease of use, how thoroughly each one actually cleans, and whether the price makes sense for what you get. Next, let me walk you through exactly how I put these robots through their paces so you know where my scores come from.

How We Test

I ran both the Aiper Seagull SE and the Dolphin Sigma for about three months each, in real pool conditions, not a lab. Different debris, different times of day, sun and shade, the works. I wanted to see how they held up over a whole season, not just on day one.

With the Aiper Seagull SE, the first thing I watched was pool coverage. Like other Aiper models I've run, the Seagull SE does a solid job scrubbing the floor. But it can't climb walls, and inclines throw it off completely. Without any real onboard navigation, it wandered, missed spots, and more than once got itself stuck down in the deep end where I had to fish it out.

The Dolphin Sigma was night and day. It hit the whole pool every time, floor to waterline, without me babysitting it. The gyroscope and dual stabilizer let it grip the wall and ride the waterline, so the tile line actually came out clean instead of getting skipped.

Next up was filtration, and this is where the Seagull SE really lost me. That flat filter just can't hold onto fine debris, and the tiny stuff was still floating around after a cycle. Cleaning it out was a chore too, more fiddling than I want from a pool robot.

The Dolphin Sigma went the other way with its dual-filtration setup. The ultrafine filters grabbed the small particles the Aiper missed, and the water came out genuinely clear. Popping the filters out to rinse them was quick and clean, which made the whole thing easy to live with.

Then there's the feature set and warranty, which mattered a lot to me. The Seagull SE's cordless idea sounds great until you live with the charge cycle. It needs 2.5 hours of charging for 90 minutes of cleaning, so it spends more time on the charger than in the pool. Pair that with a one-year warranty and the battery-life complaints I've seen floating around, and I get nervous about the long haul.

The Dolphin Sigma stacks up the features: app control, a programmable weekly timer, and a three-year warranty. Scheduling cleanings from the app was genuinely simple, and having that backing on the warranty makes it an easy machine to recommend for the long run.

Bottom line after three months: the Aiper Seagull SE looks sharp and costs less, but it comes up short where it counts against the Dolphin Sigma. The Sigma's tech, its full coverage, its far better filtration, and its easy-to-use extras make it the clear pick if you want the best cleaning I can point you to.

Want to see what else I'd put on your short list? Take a look at my roundup of the best pool robots for this year. Everything on it has been through the same testing so you can shop with a clear head.

Coverage

Coverage is where these two really split apart. The Aiper Seagull SE only does the floor, and it fights you on inclines. With no onboard navigation, it more or less bounces around at random, so it skips whole sections and leaves debris sitting there for you to deal with.

The Dolphin Sigma is a different animal. It cleans floor to waterline, every pass. The gyroscope and dual stabilizer let it grip the walls and ride the tile line, which is the exact spot cheaper robots like the Seagull SE tend to ignore.

The coverage scores put a number on it. The Aiper Seagull SE lands at a 3 because it just doesn't reach much of the pool, while the Dolphin Sigma earns a perfect 10 for clean, complete passes. That gap tells you the Sigma can handle a wider range of pool shapes and surfaces without skipping the tricky parts.

With the Seagull SE's random path and no navigation to guide it, you'll end up grabbing a manual vacuum for the spots it missed or the debris it left stranded. The Sigma maps out a deliberate path instead, so nothing gets skipped and you're barely doing any cleanup yourself.

All told, the Dolphin Sigma is the easy winner on coverage. Its navigation, its scrubbing power, and its ability to reach every part of the pool make it the one to get if you actually want a clean pool without picking up the slack yourself. The score gap isn't subtle, and it puts the Sigma near the top of the pack.

Filters

Line up the filters and you get another clear split. The Aiper Seagull SE runs a flat filter, and it's never impressed me at catching fine debris. It struggles with the small stuff, clogs more than I'd like, and generally asks for more hands-on maintenance than a pool robot should.

The Dolphin Sigma runs a dual-filtration system: a standard fine filter plus an ultrafine one. The standard filter handles the everyday debris while the ultrafine catches the tiny particles, and the water comes out genuinely clear instead of a little hazy.

Maintenance is the other half of the story. The Seagull SE makes you pull the unit apart to get at that flat filter, which is a pain when you're doing it a couple times a week. The Sigma's filters slide right out for a quick rinse, and that difference adds up over a season.

On actual debris capture, the Seagull SE just can't hold the fine particles. It'll grab bigger stuff, but the small contaminants slip through and leave the water looking less than clean. The Sigma's filters cover the whole range, from leaves and twigs down to fine sand and algae.

Now the scores. The Aiper Seagull SE comes in at a filter score of 2, which fits its thin filtration and clunky cleanup. The Dolphin Sigma pulls a 9.4, and that reflects how complete and low-effort its filtration really is.

Filtration goes to the Dolphin Sigma, and it isn't close. The dual-filter setup, the easy maintenance, and the wide debris capture make it the pick if you want the pool water to actually look clean. That score gap, a 2 against a 9.4, says the rest.

A quick practical note from living with both: filter quality is one of those things you don't notice until it's bad. With the Seagull SE I found myself running extra cycles to make up for what the flat filter let through, which eats into that already tight battery window. With the Sigma I rinsed the filters out, dropped them back in, and moved on. If you have a lot of fine dust, pollen, or algae in your area, this category matters more than almost any other, and it's where cheap robots quietly fall down. If you're weighing top-shelf options, I'd also point you at the Dolphin Premier and the Dolphin Quantum, both of which I rate highly.

Feature Set

Compare the feature sets and the whole personality of each robot comes through. The Aiper Seagull SE is built to be an affordable, cordless option, while the Dolphin Sigma leans on its commercial-grade hardware.

The Aiper Seagull SE sells itself on going cordless, and there's real appeal in ditching the cable. It's a good-looking unit too. But the charging math is the catch: 2.5 hours on the charger for 90 minutes of cleaning. That's a lot of downtime, and it means the robot is plugged in more than it's working.

On the tech side, the Dolphin Sigma pulls ahead with app connectivity over both Bluetooth and Wi-Fi. The app lets you run and schedule the whole thing from your phone, and being able to start, stop, and program it from the couch is exactly the kind of hands-off setup I want out of a pricier robot.

On warranties, the Seagull SE gives you one year, which tracks with its budget build. The Dolphin Sigma comes with three years, and that longer coverage says the maker trusts it to hold up over several seasons. That matters when you're spending real money on a machine that lives in chlorinated water.

The Seagull SE lands a modest 3/5 in features because there just isn't much to it, while the Sigma takes a perfect 5/5. The Sigma's gyroscope and dual stabilizers give it navigation and precision the Seagull SE can't match, and the app rounds it out.

For day-to-day usability and the extras that actually matter, the Dolphin Sigma is out front. The gyroscope and dual stabilizers keep the cleaning tight, and the app makes it feel modern instead of fussy. The Seagull SE keeps the price low, but it skips the features most pool owners end up wanting.

So the Dolphin Sigma takes this one on its tech, its app, and its longer warranty. The Seagull SE is priced well, but it doesn't hand you the same features, durability, or ease of use. If you're after the best cleaning and the least fuss, the Sigma is the call.

Conclusion

Add it all up and the Dolphin Sigma lands at 9.8/10. The Aiper Seagull SE sits way back at 2.6/10, and that number reflects how much it gives up on the cleaning that matters.

So the Sigma wins this one by a mile, on the strength of its full coverage, its filtration, and its easy app control. The Seagull SE is cheap, no argument, but it's missing the features and the performance you need to actually keep a pool clean.

If the Seagull SE's low score has you looking elsewhere, I'd steer you toward the Dolphin Premier or the Dolphin Quantum. Both are strong all-around machines with great cleaning and better value than the Aiper.

Spending on a robot that actually pulls its weight, like the Dolphin Sigma, means you get to enjoy the pool instead of scrubbing it. For more of my hands-on reviews and head-to-heads, my full list of the top pool robots is the place to start.

Alternate Robots

The Aiper Seagull SE and Dolphin Sigma aren't the only robots worth a look. A model I keep coming back to is the Dolphin Premier. Its filtration and cleaning are excellent, and it's the one I'd hand somebody whose pool is buried in leaves.

The Premier's Multi-Media filtration is the trick here. It swaps between filter types to handle everything from big leaves down to fine particles, and the oversized leaf bag and NanoFilters mean you can dial it in for your exact debris problem. Add the three-year warranty and it's an easy pick if you want performance you can count on.

Another one I'd put in front of you is the Dolphin Quantum. It cleans hard and it's a good fit if you just want the pool done without any effort on your end. The hyperbrush scrubbing and its navigation get it into every corner, floor and walls alike.

The Quantum's filtration is a real highlight too. It ships with both standard and ultrafine filters, so it grabs the big debris and the microscopic stuff in the same pass. It's easy to run and easy to clean out, which is a big part of why I rate it so well.

Last one: the Aquabot REVA, which I'd bring up if you're watching your budget but still want real cleaning. It does the waterline, has a gyroscope, and includes app connectivity, so you're getting a lot for the money. Its dual-layer filtration catches the small particles most cheap robots miss.

The REVA is compact and efficient, which makes it a smart buy if you want to spend less without giving up the good stuff. The app control is a nice touch and sets it apart from other budget picks that skimp on features.

Starting with the Aiper Seagull SE versus the Dolphin Sigma is fine, but the Premier, Quantum, and REVA all deserve a spot on your list too. For the full rundown, my picks for the best pool robots this year compare everything side by side.