Introduction
I bought both the Aiper Seagull SE and the Dolphin Explorer E30 with my own money and ran them in my own pool, because the only way I trust a comparison is if I've actually watched both robots work. I filmed the whole thing for my channel and wrote up full reviews of each one, so this isn't spec-sheet guesswork. When you're about to spend a few hundred dollars on something that's supposed to save you time, you deserve to know how it actually behaves in the water, not how it reads on a marketing page.
Both of these cleaners have a hook. The Seagull SE grabbed my attention with a longer battery and a fresh design, and on paper that sounded like a real step up over the older Aiper models. In the pool, though, the story changed fast. It only cleans the floor, the filtration is weak, and after a few weeks I was doing more manual cleanup than I should have been for a robot I paid for. That's the pattern that kept repeating: it looks the part, then leaves you finishing the job.
The E30 is a different animal. Dolphin added Wi-Fi to it, and it climbs up to clean both the floor and the waterline, which you almost never get at this price. It moved around my pool with a plan instead of bouncing off walls at random. It's not flawless either. Its biggest weakness is that it ships with one filter option and nothing finer, and that shows up when the water gets cloudy.
My reviews go deeper on all of this. On the Aiper Seagull SE, I liked the price and honestly not much else once I'd lived with it. The Dolphin Explorer E30 was the opposite: strong pool coverage, but that single filter held it back, and filtration is the thing most pool owners actually care about day to day.
Next I'll walk you through exactly how I put these two through their paces, so you can see where those scores come from and decide which one fits your pool.
How We Test
Here's how I test, because a number means nothing if you don't know how I got there. I run each robot in my own pool for three months. Not a weekend, not one demo cycle. Three months tells you what a cleaner is really like once the newness wears off, how it holds up, and whether it's a pain to live with. Anyone can make a robot look good on day one. What I care about is week ten, when the filter's been rinsed a dozen times and the battery's been through its cycles. I score every robot on the same three things: pool coverage, filtration, and feature set plus warranty, and I keep the conditions the same so the comparison is honest.
With the Aiper Seagull SE, the first cycle looked fine. By the third month, the shine was gone. It only does the floor, it needed charging constantly, and because the filtration is so thin, it kept leaving debris behind that I ended up netting out by hand. A robot that makes me finish its job isn't saving me time. The lightweight body is genuinely easy to pull out of the water, I'll give it that, but light doesn't clean a pool, and I found myself out there with a net more often than I'd like to admit.
The Dolphin Explorer E30 was a much better roommate over those three months. It cleaned the floor and the waterline consistently, cycle after cycle, and it didn't leave me second-guessing whether it had actually done anything. The Wi-Fi plus the programmable timer meant I could schedule it and walk away instead of babysitting it, which is the whole reason you buy a robot in the first place. Set it, let it run, come back to a cleaner pool.
"Cheap up front, but you pay for it every time you clean the pool yourself."
The E30's real weak spot is filtration. It comes with a single filter and no NanoFilters, so it wrestles with bigger debris and doesn't clear cloudy water the way a robot like the Dolphin Premier does, since that one gives you multiple filter options. Finer particles slip right through. If your pool mostly deals with leaves and everyday grit, you'll barely notice; if you fight fine algae or dust after a windstorm, you'll feel that single filter's limits pretty quickly.
So where does that leave the E30? It's a genuinely solid pick if you want full pool coverage and Wi-Fi without spending a fortune, and for a lot of families that's exactly the sweet spot. But if you want a cleaner that truly handles everything on its own, with better filtration and a longer warranty, I'd point you toward the Dolphin Quantum or the Dolphin Premier instead. You'll pay more, but you'll spend less time with a net in your hand.
Bottom line after three months: these two aren't in the same league. Both have real strengths and real flaws, and my reviews break down every one of them. If you have a small pool with a flat floor and a tight budget, the Seagull SE will technically clean it, but for almost everyone else the E30 is the smarter buy.
A quick word on how I weigh all this, since people ask. Coverage is usually the first thing I judge, because a robot that can't reach half your pool is a non-starter no matter how nice its filter is. Filtration comes next, because it's what actually keeps the water looking good between cleanings. Features and warranty round it out. The Seagull SE stumbles on the first two, which is why it can't be saved by being cheap. The E30 nails coverage, does okay on features, and only really trips on filtration, and that's a far more forgivable set of flaws.
One more thing worth saying plainly: I'm not paid by Aiper or Dolphin, and I bought both units at retail out of my own pocket. If the cheap one had won, I'd have told you to save your money and buy it, no hesitation. It didn't, so I won't. My whole job here is to be the friend who already made the mistake so you don't have to. Read the linked reviews if you want the full picture, and keep checking back for more of what I find.
Coverage
On coverage, the gap between the Aiper Seagull SE and the Dolphin Explorer E30 is obvious the moment you watch them run. The Seagull SE is built to clean only the floor of your pool, and that's a real limitation if you own an inground pool with walls that need attention.
It gets worse. The Seagull SE can't handle inclines or slopes, which I saw firsthand. It has no navigation system, so it just wanders. It misses spots, doubles back over ground it already covered, and leaves debris that I had to go clean up myself. In a small rectangular pool that random pattern eventually stumbles onto most of the floor, but in anything with a deep end or a shaped bottom, it leaves gaps you'll notice.
The E30 covers ground the Seagull SE simply can't reach. It cleans both the floor and the waterline, and the waterline is where a lot of the ugly stuff lives, the algae and grime that build up right at the water's edge. That's the part the Seagull SE never touches.
The E30 also has a real navigation system, so it moves deliberately instead of drifting around hoping to get lucky. It didn't leave big gaps in my pool, and its mix of brushes and jets let it grip the wall and actually scrub at the waterline instead of just bumping into it.
None of this is a surprise once you see them side by side, which is why the Dolphin Explorer E30 earned a coverage score of 9, way ahead of the Aiper Seagull SE's score of 3. That's not a close call. The E30 simply cleans more of the pool, more reliably.
"Floor-only versus floor-to-waterline isn't a debate. The E30 walks it."
So if coverage is what matters to you, the Dolphin Explorer E30 is the clear winner between these two. Its waterline cleaning and its navigation make it far more dependable than the Aiper Seagull SE, which never really got the whole pool clean. If you own an inground pool, that waterline coverage alone is worth the difference in price, because scrubbing that ring by hand every week gets old fast.
Filters
Filtration is where both of these robots have something to answer for, just in different ways. When I compared the systems on the Aiper Seagull SE and the Dolphin Explorer E30, neither one impressed me, but one is clearly worse than the other.
The Seagull SE uses a flat filter, and it struggles on both ends. It doesn't catch fine debris, and it doesn't do great with larger debris either. That meant I was pulling it out to rinse and clean it constantly, and I was still finding stuff the robot had missed. A flat filter just doesn't have the depth or surface area to deal with the range of junk that ends up in a real pool. Fill it with a handful of leaves and it's basically done working until you empty it, which in a leafy backyard can be halfway through a single cycle.
The Dolphin Explorer E30 steps up to a standard fine filter basket. It's better than the Aiper's flat filter, but I don't want to oversell it. It still isn't great with the finest particles or with heavy loads of larger debris, it clogs faster than I'd like, and it doesn't clear cloudy water the way I hoped it would.
What really separates the higher-end machines, like the Dolphin Quantum, is multiple filter options including Ultrfine "NanoFilters." Those grab tiny stuff, sand and algae, and that's what actually gets your water clear. The E30 doesn't offer that, and its filtration is capped because of it.
On the scores, the Aiper Seagull SE landed a 2 for filtration and the Dolphin Explorer E30 a slightly better 3. Neither number is anything to brag about, and neither robot is anywhere close to what a Dolphin Premier or Dolphin Quantum does, since those are built with far better filtration and multiple filter media to choose from.
So if your pool sees a lot of fine particles or a lot of leaves, know that the Dolphin Explorer E30's single basket may not be enough. And the Seagull SE's flat filter struggles even more than that, which makes it the harder one to keep a pool truly clean with.
Add coverage back into the picture and the overall winner is the same one: the Dolphin Explorer E30, with its coverage score of 9 against the Aiper Seagull SE's 3. Cleaning from the floor all the way to the waterline is what makes the E30 worth the money in this matchup, even if you'll still want to empty its basket regularly and maybe rinse it under the hose after heavy debris days.
"Better coverage and better filtration. The E30 takes both."
If you want serious filtration and full coverage, the Dolphin Quantum and Dolphin Premier are the ones to look at. But strictly between the Aiper Seagull SE and the Dolphin Explorer E30, the E30 is the more capable, more reliable choice.
Feature Set
Once you get into the actual features, the Aiper Seagull SE and the Dolphin Explorer E30 pull apart fast. Both try to make pool cleaning easier, but they deliver on that promise very differently.
The Seagull SE's headline feature is that it's cordless, and cutting the cord sounds great until you use it. In practice it spends more time charging than cleaning. The battery is up to 90 minutes now, better than earlier models, but you're still charging it daily, and it just doesn't have the muscle to clean efficiently in that window. Think about what that actually looks like day to day: pull it out, plug it in, wait, drop it back in, repeat. That's a lot of steps for a machine that's supposed to be doing the work for you, and the cordless convenience quietly turns into a cordless chore.
The E30 comes with Wi-Fi and a programmable timer instead, and those two together are what actually make life easier. I could set a schedule and control the robot from inside the house without walking out to the pool every time, which is exactly what you want if your days are already full.
"Wi-Fi and a timer beat a cordless robot you have to charge every night."
On usability, the Seagull SE falls behind because it has no onboard navigation. It cleans in a random pattern and misses spots, plain and simple. The E30 navigates with intent thanks to its onboard system, so it actually covers the whole pool, waterline included, without me steering it.
That's reflected in the scores. The Aiper Seagull SE got a low feature score of 1, dragged down by its thin feature list and the constant recharging. The Dolphin Explorer E30 came in higher at 4, mostly on the strength of its Wi-Fi, its programmable timer, and its navigation.
Warranty matters too, and it's another spot where the Seagull SE loses. It carries only a one-year warranty, which is short for this category. The Dolphin Explorer E30 gives you a 2-year warranty, so you're covered longer if something goes wrong. On a piece of equipment that lives in water and takes a beating, that extra year of coverage isn't a small thing, it's real protection on your investment.
Add it all up and the Dolphin Explorer E30 is the stronger machine here, with better features, better usability, and a longer warranty. The Aiper Seagull SE leans hard on being cordless, but the daily charging and the missing features make it the less practical robot for actually keeping a pool clean.
"Between these two, the E30's Wi-Fi and navigation make it the one I'd trust."
If you want more, better filtration and longer warranties, look at models like the Dolphin Premier, Dolphin Quantum, and Dolphin Sigma. They step things up for pools that need a more serious cleaning solution.
For a mix of convenience, efficiency, and real features between these two, the Dolphin Explorer E30 wins. Its higher feature score and better day-to-day usability make it the smarter buy over the Aiper Seagull SE. The Seagull SE isn't a scam, it just aims low and hits low, and the E30 gives you meaningfully more robot for not a lot more money. That's the whole comparison in a sentence.
Conclusion
Pulling it all together, the Aiper Seagull SE and the Dolphin Explorer E30 each have clear strengths and clear weaknesses, but they don't end up close. The Seagull SE landed an overall score of 2.6, held back most by coverage and filtration. Floor-only cleaning plus a weak filter really hurt it.
The Dolphin Explorer E30 scored a much higher 7.7, carried by its coverage and its feature set. Cleaning both the floor and the waterline, plus Wi-Fi and a programmable timer, made it the more efficient and easier robot to live with. It still gets held back by its lack of advanced filtration, and that's worth knowing going in so you're not surprised when the water isn't quite as clear as you hoped after a dusty week.
Put simply, the Dolphin Explorer E30 beats the Aiper Seagull SE in nearly every category I test. If you want a dependable robot that cleans the whole pool, the E30 is the better of these two by a wide margin, and its score reflects that. The only real reason to choose the Seagull SE over it is a hard budget ceiling or a tiny pool where floor-only cleaning is genuinely enough.
"The E30 cleans more of the pool and keeps the water clearer. It wins."
If neither one is quite right for you, there are better machines out there. I'd look at the Dolphin Premier, Dolphin Quantum, and Dolphin Sigma. They bring more features, multiple filter options, and longer warranties for a more complete cleaning setup.
So yes, the Aiper Seagull SE is cheap, but it gives up too much in performance and reliability to earn my recommendation. The Dolphin Explorer E30, flaws and all, is the better choice of the two. And if you want the best cleaning you can get, stepping up to Dolphin's higher-end models will get you there. I'd rather you spend a little more once than replace a disappointing robot in a year and end up paying twice.
Take a look at my reviews of stronger cleaners like the Dolphin Premier, Dolphin Quantum, and Dolphin Sigma for more. Stick with Pool Pad for the latest testing and advice on keeping your pool clean.
Alternate Robots
The Aiper Seagull SE and the Dolphin Explorer E30 each have their thing, but if I were spending my own money, there are a few other robots I'd genuinely rather own.
The first is the Dolphin Quantum. Its filtration is a real step above, with multiple filter types including Ultrfine "NanoFilters," so it catches even the fine stuff that leaves your water looking cloudy. On top of that, its PowerJet 3D mobility takes it cleanly from the floor up to the waterline. It's the robot I'd buy if I wanted to stop thinking about my pool water and just enjoy it.
The Dolphin Premier is another one I keep recommending. Its Multi-Media filtration lets you swap between filters, including oversized leaf bags and Ultrafine "NanoFilters." If your pool deals with all kinds of debris, that flexibility is huge, and its waterline cleaning means nothing gets skipped. Toss the leaf bag in during fall, swap to the fine filter the rest of the year, and it just handles whatever your yard throws at the water.
"If your pool throws everything at it, the Premier's swappable filters earn their keep."
And I'd be leaving one out if I skipped the Dolphin Sigma. It's built on a commercial-grade platform with three motors, a gyroscope, and Wi-Fi for scheduling and control. Its filtration keeps the pool clean with almost no input from me, which is exactly what you want if you're busy and just want it handled. It's overkill for a small backyard pool, but if you've got a big one or you just want the sturdiest option, it's built to take it.
If you want to see how everything I've tested stacks up, my full rundown lives on the best pool robots page. The short version: the Aiper Seagull SE and Dolphin Explorer E30 are fine for what they are, but stepping up to the Quantum, Premier, or Sigma gets you a cleaner pool with a lot less effort.