Office provides these mobile apps:
Office for Android™ and Office for iPad®:
You can view, create and edit documents with touch-friendly Word, Excel and PowerPoint apps. Word offers track change and add comments functionalities. Content and formatting stay intact to look the same on PC or Mac. Documents can be viewed for free, while editing and creating documents requires an eligible Office 365 subscription.
Office Mobile comes built-in on Windows Phone 8 and select models of iPhone and Android phones. Office Mobile offers content viewing and on-the-go editing with content formatting consistency. Office Mobile for iPhone and Android phones are free for non-commercial use. To edit or create documents or to access documents stored in SharePoint and OneDrive for Business on premises, you must have a qualifying Office 365 plan.
The Windows Phone 8 includes a pre-installed version of Outlook that you can use to access your Outlook.com, Office 365, or Exchange email.
The mobile OneNote app allows you to access your notes while on the move. This app is available for Windows Phone 8, iPhone, iPad, and Android phones.
OWA – Outlook Web Access
If you have an Office 365 subscription that includes Exchange Online, you can use the OWA app to sort, scan, and respond to email, and stay on top of your schedule. This app is available on iPhone and iPad.
For companies that use Skype for Business or the latest version of Lync, the mobile Lync app or the Skype for Business mobile app can be used to stay connected through the mobile. This app works on Windows Phone 8, iPhone, iPad, as well as Android phones.