Is there an app that will switch to 3G because of location?

I know that sounds like a strange request but, I live in a low area that has a weak signal. Sprint gave me an Airave to take care of the problem, problem solved. Also my last phone (Note 4) had wifi calling, problem solved. Now I have a 6P no wifi calling, problem. I have my phone set on LTE (recommended) and when I'm in my house the signal is in and out and especially in my office that is in my basement I miss calls.

I would like to have an app the when I am in a specific location (my house) it automatically switches to 3G so I can hit my airave without having to manually switch it. Any suggestions?

Thanks,