Hi @Tanalei,
L&L’s developers have mentioned plans to provide an Android version of both Scrivener and Scapple. For reference, see this older post by Keith (founder, main Scrivener designer, Mac/iOS developer) and this more recent one by Tiho (Windows developer).
Windows Scrivener runs on a framework called QT which does support Android, so at least some aspects of Windows Scrivener can be leveraged for Android Scrivener development.
But -
L&L will not provide anything like timelines or hints of a release date for future product releases. So, as @RuffPub said, we are probably years away from a product release.
Base your purchase decision on apps available now. You can download the trial version of Scrivener and use it for 30 days. Experiment with the Android apps mentioned by @Vincent_Vincent to see if they work well enough with Scrivener to support your process. If you chose to try it out, come back to the forum with any questions you have–there’s always someone around willing to help.
Funny, in 2014 I was contemplating using OneNote for writing a novel until I discovered Scrivener. I still use OneNote on a daily basis for all sorts of things, but for long form fiction it would be really rudimentary and no comparison to Scrivener.
Best,
Jim