User Ranks are ranks in which shows what the total level of yours is personally. Complete chapter 2 to get User Ranks. Every time you upgrade a cat, you get a User Rank point. At certain levels, you get special rewards. If you already have many cats upgraded, it adds it up while you don't have it. The first prize is 800 points, RARE CAT TICKET! Search it up for more info. ( ^ω^ )
To get level 20s, complete chapter 2, to get level 30 normal units, open cat capsules, to get level 30 rares, super rares, uber rares, and legend rares, you have to get rank 900-1400, to get level 30 specials, get rank 1600, to get level 25 crazed, get 3600 rank, to get level 30 crazed, get 3650 rank.