Feature request: cumulative balance across months

Hello,

I’m really enjoying using your app to manage shared expenses — it’s well designed and very useful.

I’d like to suggest a feature that I believe would significantly improve the user experience.

At the moment, the balance (who owes whom) is calculated only on a monthly basis and resets every month. It would be extremely helpful to have a cumulative balance, so that any remaining balance from previous months is carried forward and included in the following months.

For example, a balance from January would automatically be reflected in February, instead of starting from zero.

Thank you for your work and for considering this suggestion.

Best regards,
Alessandro