you can ask to split paycheck direct deposit into 10 different checking accounts, if you in US at least.
I'm also a bummed Simple customer and they made it so easy to set up buckets for literally anything with zero overhead, which encouraged a ton of saving from me.
When I started, I was diligenty using the savings goals. I had a goal for a car, a house down payment, cell phone upgrade, etc.
Eventually as my account and goals grew, I found it to be stupid to leave so much uninvested. I just kept a mental note to keep my balance at around $15-20k, transferred everything else to my brokerage.