What it does: Acorns puts your money into preconfigured portfolios that it says were created by Nobel Prize-winning economist Harry Markowitz. You can deposit as much as you like, but it also automatically saves your spare change — what it calls microinvesting — and then automatically buys securities once you have enough money.
$1 per month for a standard microinvesting account.
$2 per month includes support for retirement savings with a recommended IRA.
$3 per month includes a checking account and automatic retirement savings.
Minimum investment: $0 to open an account, but you need $5 to start investing.
Unique features: You can deposit money directly into Acorns, but you can also automatically round up the money you spend on purchases and have the rest deposited into your account. If you spend $2.55 on a coffee every day, for example, you can have the 45 cents of change put right into your Acorns account. Also if you shop with Acorns partners enough, some of the money you spend with them will be returned to your account. If you buy from Apple, for example, 1.2% of your purchase goes into your Acorns account (after 120 days.)