i use storygraph and the rating is 0-5 and is quite specific as you can add 25 / .5 / .75 to your rating so i do

5 stars - very rare for me to give basically means i think it’s extremely well written with no flaws (a masterpiece) 4 stars - not without flaws but still amazing (some of my favourite books are even 4 stars because an imperfect book can often still hold a huge place in your heart) then i use the more specific ones for 3 star ratings so 3.25 stars for an average book and 3.75 for one which was great but not enough for a full 4 because it didn’t excite me enough to rank higher (basically not a new personal favourite) and 2 stars for books i liked the plot of but hated the execution (books that are inconsistent with the quality of writing can also fall into this category) 1 star is rare, usually reserved for modern books which i just found deeply offensive, that can’t be explained away by the time they were written in i don’t really give 0 star ratings because i got so used to using 1-5 on goodreads before i switched