Can I install on an Android 4.4 tablet?

A new tablet, for an elderly non-technical user. It uses Android 4.4, and I would like to have Writer and Calc. Can I download this, and if so where is the appropriate link?

Libre Office offers only a viewer version:
There is a not official version of Open Office for Android: For me it is not very friendly.

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Thanks for your help, Charlie. I have a further problem, and the tablet’s makers don’t offer a support service. I looked up the Google link, and downloaded and installed the program. I noticed that the memory used went up significantly, but I don’t know how to find the program! There is nothing in the download folder, the file manager, or the app icons panels. It’s Android 4.4 … any suggestions?