Why Not Available On Google Amazon

Avast Mobile Security Avast Mobile Security for Android
1

I recently purchased a Kindle Fire. It had a trial of Trend Micro. I would like to put Avast Free on it, but cannot find a way. Google and Amazon show that it will not work on my device?
Help?

Thanks, Jerry

2

Maybe I asked the wrong question so here is another try.
Does Avast support Kindle FireHDX?
If so, how do I get it on my tablet?

Thanks, Jerry

3

Mods, you are really helpful.
Jerry