<prompt> Human: Im paid fortnightly, and pay rent weekly. I have a few monthly expenses, mostly bills. I shop for groceries weekly. Im also trying to save for a holiday over the new year. I want an app where I can see how much more I can spend on groceriesessentials, how much more I can spend on fun, preferably weekly. Ive tried a few goodbudget, youmoney and they havent suited me. Anything you can suggest?  <response>: YNAB 