Funny thing, this was actually the original functionality I had planned for creating tags! The first time I tried implementing it though, the code for ended up being really complicated and confusing, so I decided I would just implement an easier solution for the time being and worry about it later.
Now that I have the app finished though, I have a much better idea of how to implement it, and the fact that there's demand for the feature is nice incentive to look into it again. Unfortunately, I'm pretty busy with life stuff for the next little while, so it might be a while before I get to updating the app, but I'll definitely keep this in mind!
Thanks for the suggestion :)