ovulation tracker and opk help

Mexiflower • Hi im Christine. and we are trying for our last baby:) i have a girl12 boy10 girl5 boy4 girl1

I've been using P tracker to track my period for a very long time ans it tells me when i ovulate and allows me to put in when i have sex but i feel as if there is a better tracker for me to really help me get pregnant. any advice and help with using opk for the first time