3D Cloud App is a free app for the iPhone and iPad that allows users to view STL files that are in email attachments, on websites, and on cloud storage services.
3D Cloud App Compatibility
The 3D Cloud app is compatible with iPhone 3GS, iPhone 4, iPhone 4S, iPhone 5 iPod touch (3rd, 4th, and 5th generation) and the iPad. The 3D Cloud App requires iOS 5.0 or later and is optimized for iPhone 5.