While the dictionary definition is not the same, I think they are "similar" enough. Also, it's up to the user to define impact/importance, depending on their state of mind/ prioritization need. It's not a rigid framework.
I only tried your app on phone but it looks like you can't tap and add or drag things around. You always need to edit the numbers. Maybe the UX/UI could use some love?
Yeah, I haven't given it that much thought. It only started as a weekend project. I would like to keep it as local as I can.
Possibly, there will be 2 uses: a non-db, non-url, local version AND an account based thing.
It's all the same. From what I read today, Eisenhower used and popularized it and then Covey improved upon it and used it in his book. Same stuff, just different packaging, this one too :D
Eventually, depending on how it goes, the URL will contain a key to some DB entry, so multi-device persistence can work.
Adding all this to the URL is doable too, I might just start with that, thanks for the idea ;)