I don't know if you've noticed, but Google announces an awful lot of stuff. So it's sometimes easy to see something new, get cautiously excited, and then kinda forget about it a few months later.
That's exactly what happened to me with the announcement of add-ons for Google Docs and Sheets on Android last summer. Google trumpeted the news of the launch from its official blog almost one year ago:
We know many of you consider your mobile device as your primary tool to consume business information, but what if you could use it to get more work done, from anywhere? We’re excited to introduce Android add-ons for Docs and Sheets, a new way for you to do just that. Whether it’s readying a contract you have for e-signature from your phone or pulling in CRM data on your tablet for some quick analysis while waiting for your morning coffee, Android add-ons can help you accomplish more.