How does the envelope budgeting system work if I don't want to carry cash?

Traditional envelope budgeting divides cash into labeled envelopes for each spending category; when an envelope is empty, you stop spending in that category. The digital version keeps the same logic without physical bills. Many budgeting apps let you create virtual envelopes or spending buckets, and some banks let you open multiple sub-accounts you can nickname by category. You can also use a dedicated debit card per major category, or simply track category balances in an app that alerts you as you approach a limit. The behavioral benefit, spending stops when the category runs dry, survives the switch to digital. Cash-stuffing is popular on social media, but the discipline, not the paper, is what changes behavior.