This app was mentioned in 1 comment, with an average of 1.00 upvote
Stranger Lights is an App I made. You write a message and it will make a GIF of the stranger things alphabet wall, spelling out your message from the upside down :) It's free for all you fans.
Sample GIF: http://i.imgur.com/J6Z4qkk.gifv
iOS App: https://appsto.re/vn/DhgEgb.i
Android App: https://play.google.com/store/apps/details?id=com.ram99.strangerlights