 And apps like Acorn and Chime are all-in-one financial platforms that have roundup features so you can link your debit card, checking account, or credit card to the platform. And whenever you make a purchase, the company rounds up the amount to the next full dollar and deposits the extra change to your savings account. Many apps use a variety of techniques to make saving money less of a hassle. Saving you money, Hilary Barsky, Fox News.