I tried out several different WordPress related posts plugins when I relaunched my blog a few months ago. There are alternatives out there that are ok, however WordPress Related Posts is by far the best.
It has mobile ready and it tracks how many times people are clicking on your related posts section. There are several styles to choose from, and 3 unique styles to choose from for your mobile style too.
You can also exclude categories if you want to. I recommend trying it out. You won't be disappointed.