Acorns allows people to round up purchases and automatically invest the change. The Acorns app and financial engine is built to facilitate commission-free micro investing in a diversified portfolio of index funds offered by the world’s largest asset managers; purchase fractional shares; and automatically save and invest small amounts of money frequently. The app can also help identify and gather found money, such as rebates and rewards, which can be automatically swept into the customer’s investment account. Great Oaks invested in Acorns's Series A Round in 2014 and Series B Round in 2015.