These two devices get recommended together constantly, which makes it sound like you need both. You probably do not, at least not at first. They solve different problems, and the right one depends on what bothers you when you look in the mirror.
They work on different things
An ultrasonic scrubber works on the surface. It uses vibration to lift buildup and residue that a cleanser leaves behind, so skin feels smoother straight after. The effect is immediate and physical, and you can feel it the first time.
An LED mask works on appearance over time. Nothing is removed, nothing is lifted, and there is no sensation during use. Any change shows up over weeks, not minutes.
One is a cleansing step. The other is a slow, cumulative one. That is the whole distinction.
Choose the scrubber if
- Skin feels rough or grainy even after cleansing
- You get congestion around the nose and chin
- Your serums feel like they sit on top rather than sink in
- You want to feel a difference immediately
Choose the LED mask if
- Your concern is the look of fine lines or firmness
- You are dealing with breakout-prone skin or uneven tone
- You are willing to be consistent for several weeks before judging
- You want something hands-free you can do while doing nothing else
If you use both
Order matters. Scrubber first on damp skin, then dry the face, then the mask on bare skin, then serums and moisturiser last. Using the mask over product residue means the light is reaching your serum rather than your skin.
You do not need both on the same evening. Many people alternate.
Which to buy first
If you cannot decide, start with the one that matches your loudest complaint. Texture and congestion point to the scrubber. Fine lines, tone and breakouts point to the mask. Buying both at once usually means one of them ends up in a drawer while you work out the routine for the other.
Before you buy either
Check that the seller publishes actual specifications. For a mask, that means wavelengths, LED count and whether it emits UV. For a scrubber, weight, modes and whether it is waterproof, since most are not. A listing that only offers adjectives is a listing you cannot compare against anything else.
Both are cosmetic devices, not medical treatments, and are not intended to diagnose or treat any condition. Any change is to the appearance of skin, and results differ from person to person.