Arriving earlier than expected, the document-creating app was originally rumoured to arrive in the autumn.
The Office app would include Microsoft Word, Excel, PowerPoint and OneNote.
Microsoft released an iPhone version in 2013 that utilised a paid Office 365 subscription to let users create and edit documents.
Pricing for the app is yet to be revealed, although Microsoft may release it for free and then require and Office 365 subscription to edit the documents that can save to OneDrive.
ZDNet also claim the Microsoft’s touch-focused version of Office for Windows, codenamed “Gemini” won’t be released until after the iPad version.
Microsoft is still the leader in word processing despite Apple’s iWorks suite and continues to grow steadily with more than 3.5 million Office 365 Premium subscribers.