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.
Based on Kvashchev’s experiment: https://pmc.ncbi.nlm.nih.gov/articles/PMC7709590/, high school students appear to have gained about 10 IQ points in 4 years by taking his creative problem solving course. If you’re using IQ as a measure (for fun? Not sure your goal here) you could read up on him first.
I’d suggest regularly taking the Mensa IQ test, I suspect over years your score will improve, slightly and with great effort.
I don’t believe this will have any effect on your life, however. You’d be much better off learning a skill. A language, instrument, or artistic endeavor will bring you orders of magnitude more satisfaction, happiness, and bragging rights. If you’re thinking about career success, just work or study more. If you’re treating creative problem solving as the hobby itself, that’s cool too.
For memory, look up pegging and other techniques. Begin by memorizing your credit card numbers, etc.