GCode Simulator (Free) is now available through Amazon App Store.
http://www.amazon.de/MDCode-GCode-Simulator-Free/dp/B00HM3B59I/ref=sr_1_1?s=mobile-apps&ie=UTF8&qid=1388658780&sr=1-1&keywords=gcode
Mathias,
Google play said that the problem I am having purchasing Gcode simulator and printer is due to a change made in a recent update that it cannot get permissions for. However, they cannot tell which one. They suggested that you put up an older version that I can buy that will then get updated. Could you do this?
Thanks, Adam
@Adam_Lindsay I don’t believe that is the reason. I tried buying my other App “GCodePrinter” which has not been updated since 11th Dec, but it does not work either.
Maybe you try buying GCodePrinter and see if it works (you can refund in the first 15 minutes) , but I think there is a general problem with my merchant account. Google support said they are still investigating whats wrong.
https://play.google.com/apps/publish/?dev_acc=07818032233501050316#MarketListingPlace:p=de.dietzm.gcodeprinter
Let me know if I can help in any way.
GCode printer does the same thing.
@Adam_Lindsay I thought so 
Just got a mail from Google, instead of a solution they send me a survey about the support quality. Guess what rating I gave them …
What support?
Google wrote: We are currently in the middle of working on your case. We’ll respond with additional information as soon as possible.
Thanks for the update! At least there is hope!
I just picked up 4 ‘used’ tablets that are a year old. They aren’t on the supported list at https://support.google.com/googleplay/answer/1727131?topic=1100168 so I can’t get google play installed on them. So no paid version of your App.
I’ve yet to try the free version to make sure it works on these as I am waiting on new USB OTG cables. I’m set up to make micros, and these new tablets take minis.
@Mike_Creuzer let me know when the free version works. I’m working on an alternative to Google payment.