This is what we do, minus the shared savings account. My partner has an app on her phone that she uses to track our expenses and we just share paying for things

This is what we do, minus the shared savings account. My partner has an app on her phone that she uses to track our expenses and we just share paying for things so we're 50/50, except for big ticket items like rent which we split based on income. Worked for us for almost 15 years.