Memory supplements broadly split into capsule-format and powder-format products — worth understanding the general trade-offs before reading this site's own specific positioning.
A powder typically requires measuring and mixing into a liquid before use; a capsule is taken as-is, with water — a difference in preparation effort rather than necessarily in ingredient potency.
This site frames its own capsule format directly as "nothing to mix, measure or cancel" — worth reading that as this site's stated case for the format, specifically contrasting with the extra preparation step a powder requires.