Microsoft's Office apps for Android and iOS could be called "Windows-based," after some recent findings.
The Office apps for Android and iOS appear to have deep ties to the Windows API. A programmer going by the name of "Longhorn" and I recently took apart the Office applications for Android and iOS and inspected their code and content. This process is known as reverse-engineering. We found that they have a lot in common with the versions found on Windows 10 Mobile, and in some cases, with Windows 10, depending on the version you use.
Full story from the WindowsCentral blog...