There are many iPhone apps which open MS-office for you, but QuickOffice is an app which helps you edit the old documents and create new documents too.This app contains three tools.
QuickWord: which lets you edit and create new MS-word documents.
QuickSheet: this is for creating or editing the Excel documents.It fully supports even the most advanced Excel features.
QuickOffice Files: It allows you to attach your iPhone as a wireless drive over WI-FI which enables you to drag and drop files between your iPhone and PC.
This is a very efficient app for anybody who works with Word & Excel files a lot
QuickOffice – Microsoft Office Suite for Smartphone, iPhone, iPad
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