In past Ask HN threads I've seen recommendations for Lunch Money ( https://lunchmoney.app/ ) and You Need A Budget ( https://www.ynab.com/ ). I can't personally speak to them as I use GnuCash, but I don't recommend it for you because it does not do automatic sync as you requested.
As I get older I'm also just doing fewer transactions in general, so it's easier for me these days to keep a hold on manual entry.