YNAB Alternatives - we don't use it enough

Just got renewed for another year at almost $120. It isn't just the cost, but what were getting for that cost. We don't use many of the features, rather than listing what we don't use, I will mention the one thing we need and why spreadsheets etc won't work.

The user interface, and ability to synchronize spending via our apps. We don't hook it into accounts, we simply put money into the app, panel it out via categories then make entries as we make purchases, I know the app can do a lot more we just don't use it.

Maybe we should use it more but this works and it's a bit weird spending almost $10 a month on an app where we use that one feature. No complaints about it just wondering if we're paying for a lot of features were not using. Does any competitors offer that one feature and do it well for less? I run a home lab and have the infrastructure to host myself if there's such a feature at a one time cost. Any options pf a tool that does that one thing and does it well?

Maybe we're getting a good value for what we're paying for and I am simply ignorant of how good we have it.

Edit: I was not clear on what the magic is with YNAB for us. It's the mobile app and its interface that allows us to enter a spend on the app and it automagically updates for both of us. If we have to manually enter into a spreadsheet it will never get done, YNAB really makes this part convenient and the reason we pay for it.