Air pulse or vibration
These get sold as if one is the upgraded version of the other. They are different kinds of stimulation, and the difference decides who should not buy the more expensive one.
They are not the same mechanism
A vibrator has a motor with an off-centre weight on the shaft. The weight spins, the imbalance shakes the housing, and that shake reaches you through the surface in contact with your body. The frequency is high — thousands of cycles a minute — and continuous.
An air-pulse stimulator has a small diaphragm or pump inside a chamber. The chamber sits over the area and the diaphragm moves air in and out, so what reaches you is a pressure wave inside a sealed space. Nothing vibrates against you. The pulses are discrete, and the rate is lower.
That difference is why the two do not feel like the same sensation turned up. Vibration is a spread-out buzz that you can feel through a hand, a thigh, a pillow. Air pulse is localised to whatever the opening is covering, and it does almost nothing if the seal is broken.
What that means in use
Vibration is forgiving. Press harder, move it, hold it at an angle — it still works. The intensity you get is roughly the pressure you apply, which is why people end up pressing harder over time as the sensation dulls.
Air pulse is not forgiving in the same way. The opening has to sit over the right spot and stay there, and the seal has to hold. Move it a centimetre and the effect drops off. That is not a defect; it is the mechanism. But it does mean the first few attempts often feel like nothing, and plenty of people conclude the product is broken when it is only misplaced.
The other thing that gets left out: air pulse is not suction. Marketing copy says "suction" because it sells, but nothing is being drawn in. If you want actual suction, that is a different category of product, and buying an air-pulse stimulator expecting it is a reliable way to be disappointed.
The honest downsides
Cleaning is worse. The opening leads into a chamber with a diaphragm in it. It is not a smooth surface you can rinse and forget. It needs more care than a solid silicone body, and the instructions matter more.
Positioning takes practice. Covered above, but worth repeating because it is the single most common reason people give up on these.
Some people feel nothing. Not "less" — nothing. There is no way to know in advance which group you are in, and no review can tell you, because the variable is your nervous system rather than the product.
They cost more. The mechanism is more complex to build than a motor and a weight.
They are usually quieter. This is the one clear win. There is no spinning off-centre mass, so the noise is a soft pump rather than a buzz. Quieter, not silent.
Who should buy which
Buy a vibrator first if you have not owned one. It is cheaper, it works from more positions, it is easier to clean, and if it turns out you do not like the whole category you have lost less.
Consider air pulse if vibration has stopped working for you specifically — not because you are bored of the product, but because the sensation has dulled even at higher settings. That dulling is habituation to a specific kind of input, and changing the kind of input is a more sensible response than buying a stronger version of the same thing.
Consider it also if direct pressure is uncomfortable. Air pulse does not press. For anyone who finds vibration over-stimulating rather than under-stimulating, that is the more relevant difference.
Skip it if you need something that works in any position, or if you want one device to do everything. It does one thing, in one place, and it needs to be in that place.
A note on the "it changed everything" reviews
The people who write those are the people it worked for. The people it did nothing for mostly do not go back to the listing a month later to say so. This is true of every product category and it is worse here, because the outcome depends on anatomy and nervous system rather than on build quality.
Read the negative reviews for the failure mode instead of the verdict. "Did nothing for me" tells you the risk. "Would not hold a charge" tells you about the product. The second is more useful before you buy.
Questions that come up
Is air pulse stronger than vibration?
Not comparable. It is a different kind of stimulus. Whether it feels stronger depends entirely on how you respond to pressure waves.
Can I use it with a partner?
Yes, but it is a one-person-at-a-time device in practice. The opening has to stay in one place, which limits what else is happening.
Do I need lube with it?
Usually not on the opening itself — the mechanism works through air, and lubricant can interfere with the seal. Check the instructions for your specific model, because some recommend a small amount around the rim.
Will it work if I have never had an orgasm from vibration?
Unknown, and anyone who tells you otherwise is guessing. The two mechanisms are different enough that a failure with one says little about the other.
More guides
Silicone or TPE
Almost every soft product in this category is sold as silicone, and a large share of them are not. The difference is not snobbery about materials. It decides how long the thing lasts and whether it can be cleaned properly.
Is it actually waterproof?
IPX7 is a real standard and most listings quote it correctly. What it does not tell you is that the test is done in clean, still, cold water on a brand-new unit, which is not the situation you are buying it for.
Cheap or expensive
One side says anything under twenty pounds is dangerous. The other says it is all the same factory. Both are wrong, and the reason is that "safety" is three separate questions that respond to price in three different ways.