What do you need, exactly? I use two apps with equally unoriginal names: "Expense Manager" is pretty simple but gets the job done, "My Expenses" (🤦‍♀️) has more whistles but I don't really need them. Both available via F-Droid.
I have downloaded 'My Expense' and 'Paisa' for budgetting, gonna give em both a try. So far I do for prefer Paisa for it's design. Greenstash is also great for setting saving goals