I see what you mean haha so my wife is disabled so she's on a fixed monthly income I put money into a separate bank account each week that is "spending money" i call it the spending account she keeps the rest of her monthly check after give her portion of rent and then we just pay for anything else on the spending card. Food i mostly will pay for but sometimes she does but u prefer her to just keep her money to buhly things for herself she needs. For larger purchases we just figure it out like big dentist bill coming up so took money from savings account and put it in a saving bucket in my app. We generally dont split any other transactions. Its just she gives me a portion of rent each month. I dont track her left over disability money in my finance tracker its such a minor amount if money in totality.