BuBoo is a free app that lets you create and manage a couple's household account book and schedule. It's easy to use, even if you have never done it before. You just need to select the couple you want to share the book with, enter the account number, and enter the password.

You will then be able to see a list of categories, which you can edit as you like. You can add, delete and reorder the categories as you like.

If you want to add an entry, just select the category and enter the entry. You can then save the entry, or delete it.