STRIK, SPIS, SOV, GENTAG
Unlike for instance digital row counters, it is almost impossible to forget to count all rows. It works so that you put the row counter on the needle at the start of the round. When you have knitted a round, go down a number on the row counter chain and continue knitting. Once you have been through all the numbers it is time to make an increase/decrease. Easy! And because you have to move the row counter chain from one needle to the other on each turn, you will not forget the counting. Smart!