Available for free download via the App Store,
these applications allow you to view Microsoft Office documents (doc , ppt , xls … ) with a quality similar in every respect to the Ms Office suite for PC .
You can synchronize your documents via One Drive and access them from another device.
Plus, when you open a document, it will continue exactly where you left off, including any modifications made.
You will have to purchase the paid version of Office 365 ( from 69 € / year) to create and edit documents, and to gain access to the wealth of features and menus of the Office suite.
But if you do not want to spend the money, Microsoft has made the Office Mobile App available for free !
The Office Mobile app allows you to view and edit Word , Excel and PowerPoint files on SkyDrive, SkyDrive Pro or SharePoint using an interface designed for iPhone ( but that also works with iPad)
Now you can work like the pros !