I see so many of them around today but I am always skeptical of the scientific validity of them. I’m happy to pay a reasonable amount and I greatly value privacy. Main thing for me would be trying to improve memory.
Any recommendations are appreciated! If I need to go out and buy a DS and a copy of Brain Age, so be it.
I would say reading books. It’s a long form activity that is a strong counter to the brain rot of scrolling and being mindlessly entertained by 100 different things for 10 seconds each. I find that when I read I have more vivid dreams which I think is definitely a sign that my brain has been fired up.