In January 2012 I released Keep Calm, a simple app that allows you to create custom Keep Calm and Carry On posters, on Android and in August 2012 I released it for iOS. Since then the app has had over 4,000,000 downloads. If each poster created with the app was printed out they would stretch across the Atlantic.
Both apps are available for free however there is the option to upgrade to Pro and get bonus features such as custom icons from photos, custom fonts, custom text colors, photo backgrounds and additional sharing options.
I’m currently using Montserrat as the default font on both platforms. In general this is very similar to the original font (the K and J are the only characters I’ve noticed to be different). The majority of the icons are from the Open Clipart Library.
You can get Keep Calm on iOS and Android: