I'm trying to decide between a radio frequency device and an ultrasound device among beauty devices effective for elasticity and blemishes (melasma).

As I get older, my skin loses elasticity and fine wrinkles are increasing. On top of that, blemishes and age spots are starting to appear one by one. Going to a salon is quite expensive, so I plan to take care of my skin at home. I am looking into beauty devices that are effective for elasticity and blemishes (age spots), but I am having trouble deciding which one to choose.

It is said that high-frequency devices deliver thermal energy to the dermis layer of the skin to promote the production of collagen and elastin, aid in blood circulation and skin regeneration, and improve skin tone.

Ultrasonic devices are said to have an excellent ability to penetrate the active ingredients of cosmetics deep into the skin.

I heard that it is good to use functional ampoules, creams, or essences together with these two devices, but I am wondering whether the high-frequency device or the ultrasonic device would be better.

If anyone has used a beauty device, please give me a recommendation.