Is it possible to play the same minecraft world on different devices?
Solution 1:
According to the Better Together update recently launched, it looks like you can use the same world on different devices as you describe it. Microsoft did a news release on this that indicates what you say you want to do is possible.
From what I know, you will probably need an Xbox live account to do this. I read this somewhere on Minecraft's official website.
Please tell me if this helped you. If it didn't, I'll do more research and edit this post.