Do you track your personal/family expenses? If yes, I bet you use a specific software or service for this.
I personally think, there is nothing better than a simple Excel workbook for that task. It allows you to stay as flexible as you want, as simple or as complex as you want.
You can use Power Query to pull data from csv dumps from your bank accounts or currency exchange rates from your favourite financial web site, use Excel formulas to convert currency, Pivot Tables and charts to analyse and visualize data etc.
In this post you will see how you can enter data to your Excel spreadsheet with expenses from your mobile phone.