I used to have a Kindle Fire so when I saw the Amazon App Store had android apps, I went for it. I was able to download some apps that I used to have on my Kindle Fire--some free, some paid. Today when I went to play some games, I got a popup message saying that I must be signed into the Amazon App Store to play the games. Well, I uninstalled those apps including the Amazon App Store app. I'm not sure if this problem was caused by Amazon or Google. I'm curious to find out the source and I hope someone on here can tell me. Thanks.