I’ve been interested in the Centr app by Chris Hemsworth since it came out last year. After all, who better to be your personal trainer than Thor himself?  ** My blog posts contain affiliate links, which means that I may earn a commission on purchases you make after clicking on those links. (At no extra cost to you!) Full disclosure here. ** Although I already have my tried and true favorites when it comes to fitness programs, (like this one or this one) I do like mix it up to keep things fresh. So last month, I finally tried it out in order to bring you this Centr app review. …