I've made a few thousand on an ebook about my app business. Not as much as I make on the apps, but it is 100% passive as opposed to mostly passive. http://buil

I've made a few thousand on an ebook about my app business. Not as much as I make on the apps, but it is 100% passive as opposed to mostly passive. http://buildanappbusiness.com/ http://buildanappbusiness.com/