In April, Acorns saw a big investment from industry giant PayPal, which contributed the majority of a $30 million round that brought Acorns' total funding to $62 million. Acorns' basic strategy is ...

And lastly, if you invite friends to Acorns, you'll each get $5 when they invest.

Explore our comprehensive Acorns Invest review. Learn how to invest your spare change into a custom portfolio with Acorn's mobile micro-investing app.