I have made a few improvements to Keep Calm and Keep Calm Pro for Android. The key improvement that has been made is that the app is now fully multi-threaded which means it is a lot less likely to crash (I am ashamed to say that, yes, everything had been running in the UI thread before – oops).
Both apps now include PT Sans as the default font and Keep Calm Pro now allows you to choose between Open Sans, Open Sans Light (which used to be the default), PT Sans and the standard system font. I chose PT Sans because it matches the original font quite well. A less major modification that has been made to both apps is the change of the background color 
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In response to comments I have also added a new option to Keep Calm that allows you to use the old designer. This feature has not been added to Keep Calm Pro as it would have made it far too complex and I believe the menu/sub-menu system that it currently uses is far more efficient.
