There are multiple ways to fund your Acorns account:
One-time: You can always add money by entering the desired amount on the Invest screen. This is a one-time investment and will not be repeated in the future.
Recurring Investments: You may set up recurring investments on a daily, weekly, or monthly basis. Select the amount of money you wish to invest regularly, and then choose the desired time period. This is done by going to Invest and selecting the Recurring screen.
Round-Ups: You may link your spending accounts (credit, debit, Paypal, etc.) and then round up the virtual change from every transaction. These Round-Ups can then be manually or automatically moved from your funding source into your Acorns account. Your transactions can be viewed on the Round-Ups screen of the app. Automatic Round-Ups can be turned on and off under the Linked Accounts section of the Settings. When enabled, Automatic Round-Ups will be automatically invested for you.
Note: These transactions will appear on your bank statement as 'Acorns Investing'