The app can only be accessed using the Office 365 subscription.
Microsoft has launched its new iPhone app called the Office Mobile that can be used by Office 365 subscribers for a yearly subscription price of $99.99.
The company has made the app available for only iPhone devices but not for the iPad and it cannot be subscribed for the in-app purchases.
Office Mobile allows users to edit, format and make documents, spreadsheets and presentations on their iPhones, Microsoft said in a blogspot.
"You can access, view and edit your Microsoft Word, Microsoft Excel and Microsoft PowerPoint documents from virtually anywhere," it added.
Additionally, the app allows users to access their documents stored in Microsoft’s SkyDrive, SkyDrive Pro and SharePoint services, along with the files attached to emails, and recently-viewed documents from their computers.