<human>: Can you provide a brief overview of the text?

My SO uses YNAB and I use my own software for our individual budgeting. Our approach to common expenses is a 50/50 deal: whenever we pay for common expenses with our personal money, we file the receipt and tally up each of our totals about once a month, and pay each other the difference if one person spent more than 50% of our total common expenses. We do not have a common account and are not planning on it for now.  

My software shows a running total of the money in my accounts and the charge on my credit card.  

My problem comes when I try to budget for myself. I don't want to have to input half of everything each of us buys because that's not actually money I've spent yet (since we settle at the end of the month), so my accounts' totals would not be accurate. However, I also don't want to only input the stuff I pay for, because I will be under/overestimating the amounts I'm spending in each category if my SO and I don't spend the same amount each month.

What are your opinions and experiences on this?
<bot>: My SO and I share expenses by paying each other the difference from 50/50, once a month. How can I keep track of my share of the common expenses in my personal budget?