Please provide information on getting free Adobe Reader

There are many users who barely use a PDF reader on their computer. From time to time they may want to sign a document. I tried to help a friend get Reader set up and I was barraged with multiple Adobe offers for all kinds of software and no clear help on just installing Reader. I wasn't even clear she could get it for free.

For occasional users of Reader, please provide a clear way to find the website via Google search, provide clear information on what Reader is, and stop trying to sell the occasional user on a more expensive product.

Also, why isn't Reader available on the Apple App store?

No wonder there are so many other PDF readers proliferating the digital landscape. 

(I am an experienced user but not a professional user and I also think there's an opportunity for a middle tier charge for my very ocassional use. I would like to know more about Photoshop and Illustrator, but I don't use it very much and I am paying a lot just for the privilege of looking at it. Would love to have you offer various levels of service, not just the professional level)