Let me propose a clarifying scenario.
Lets say you had $450 in your checking account, and had a payday coming in a few days.
You are suggesting you want to transfer this $450 to your savings account?
You can do that today, by creating a transfer from your checking account to your savings account for the $450 remaining balance.
I think there are not many who do this on a regular basis, such that we’d not likely automate this, however, creating transfers in this way are straight forward, and you can even create repeating transfers into the future which will just need to be adjusted as the amounts vary from entry to entry.
Hope that answers your question. Let me know if you had something else in mind.