# Budget > [!info] Definition An estimation > of [_revenue_](https://www.investopedia.com/terms/r/revenue.asp) and > [_expenses_](https://www.investopedia.com/terms/e/expense.asp) over a > specified future period of time and is usually compiled and re-evaluated on a > _periodic_ basis. -- Investopedia - Three types: _surplus budget_, _balanced budget_, and _deficit budget_. ## Apps - [Best Budgeting Apps | Investopedia](https://www.investopedia.com/best-budgeting-apps-5085405) - [Best Budgeting App for a Newbie? | Reddit](https://www.reddit.com/r/personalfinance/comments/100brbd/best_budgeting_app_for_a_newbie/) - Noticeable options - YNAB - expensive but hands on tool - Mint - top free tool - Copilot ## Resources - [What Is a Budget? Plus 10 Budgeting Myths Holding You Back | Investopedia](https://www.investopedia.com/terms/b/budget.asp) - [Personal budget | Wikipedia](https://en.wikipedia.org/wiki/Personal_budget)