I added extra color to the app and it is important to note that this update supports iOS6 and 'sort of' supports iOS7. Go ahead and upgrade to iOS7 if you can.
There is a new app store capability I just discovered and that was not well known, that allows older versions to remain available for download. You don't pick a version, but you will automatically download the newest version your device supports. This makes sense if the versions have the same content, as they do in the case for series 11 for this app. I sort of lucked into this by making the iOS6 version first, then upgrading my computer to make an iOS7 only version. I think I can also make an iOS6 version for SWMinis and also an iOS7 version, but will need to test this.