You can think of round-ups as spare change you'd get at the store, which would end up lost between sofa cushions or car seats anyway.
When you connect a Monitoring Account, which could be a credit or debit card, we fetch a daily list of transactions from that account. We then "round up" each purchase to the nearest full dollar.
Thus, a $2.49 coffee would get "rounded up" to $3, and we'd add the difference of 51¢ to your total round-ups, which you can see on your dashboard. A full-dollar transaction, like $15.00, would add a $1 round-up to the total.
When the total round-ups reach $10, we trigger a bond purchase of $10, just as if you would have purchased one bond manually. The funds get transferred via ACH to our bank, and we issue your bond when the final transfer clears.