oot has the following modest (for an app released in 2013) requirements:
Hardware:
iPod Touch (3rd. Gen.) or newer
iPhone 3GS or newer
iPad (any)
Software:
iOS 5 or 6
Limitations current limitations of iOS:
Both iOS 6 and 5:
5.x.x:
6.x.x:
*1:-The Sharing / "Open In…" menus in Apple branded apps on your iDevice do not allow non-Apple branded products to show up. This applies to all developers, the world over.