Here are the various system requirements for DragonBox/DragonBox+

IOS

Requires iOS 4.0+ & armv7 processor i.e. compatible with iphone since the 3gs, all ipads and ipods since the 3rd generation except for the 8GB of the 3rd generation (MC086LL). Older ipods (like first generation ipod touch) are not supported [source]. 

Android

compatible with all but oldest android phones and tablets. Requires Android 2.2+ & armv7. Tested on several android phones including (but not limited to) Samsung Galaxy S, SII, Tab 10.1, LG Optimus, HTC Sense, HTC, Google Nexus.

The exact list of supported phones is not available at the moment. You can usually find out if a phone will be compatible by identifying on a site like gsmarena.com the android verison and the chipset your phone has. E.g. the Sony Xperia Arc S has a Qualcomm MSM8255 Snapdragon chipset. Then by searching that chipset name, you will find the CPU instruction set on the internet. Wikipedia often has that information. For the aforementioned chipset it is armv7, thus compatible. Send us a mail if you're unsure.

Note: a few devices supposedly compatible but exhibiting specific bugs have been excluded from the Google Play store. 

Mac OS X

Mac OS X 10.6.6 or above.

Windows

Windows requirements should be

• XP SP2 or more
• Graphics card with DirectX 9 level (shader model 2.0) capabilities. Any card made since 2004 should work.
  

Windows 8

Windows Store should filter incompatible devices. We haven't set specific extra requirements.

Flash

The flash version requires flash v11.2 or later. See the flash player specific requirements.