In Prudent, you can combine multiple journals. Your wife can maintain a separate journal while you maintain another one. This way, both parties can do whatever they want or agree to some set of rules. Most importantly, at any time, you or your wife can see the combined financial strength, or individual financial situation. Awareness of both can make a big difference in making important financial decisions. Avoid being penny wise, pound foolish. The combined report (of savings, etc.) gives both of you better insights on the financial journey that you can embark together (i.e. buying a house, having kids, moving cities, etc.)
https://docs.prudent.me/docs/combining