Microsoft on Tuesday will release its first Office app for the iPhone — OneNote.

[ad#Google Adsense 300×250 in story]The note taking app is not available in Mac versions of the Office suite, but Microsoft does talk about the Mac in the release of the app, according to a story on AllThingsD.

“We know people care more about what they do than where they do it,” Microsoft Office unit Vice President Takeshi Numoto says in a blog post being published on Tuesday. “Whether it’s on a PC or Mac, a mobile phone or online through the Web Apps on multiple browsers, we continue to bring Office to the devices, platforms, and operating systems our customers are using. It should be about the ideas and information, not the device, right?”

Notes taken using the iPhone app will automatically be backed up using Microsoft’s Windows Live SkyDrive. It’s not clear from the report how Mac users will interact with the service.

The app will be free for a limited time.