Autodesk AutoCAD 360
AutoCAD 360 is a user-friendly mobile drafting and design app that lets you view, edit and share your AutoCAD drawings on your mobile device, such as a phone or tablet,
allowing you to add accurate measurements to your drawings when on site. You can even access your drawings via an external cloud storage service (Dropbox, Google Drive, etc.), so you can work offline and synchronise your files once you're online again.
In 2017, 360 Pro now has a new name: AutoCAD Mobile app Premium.
AutoCAD 360
See the software range here