It’s never too early to start squirreling away some money for the future, even if it’s only a few bucks at a time.

Financial apps can help, as long as you’re not nervous about giving companies access to your financial data.

Acorn

This investing app takes the concept of seed money and runs with it. The app is designed to let you drop in $5 to invest. It also lets you round up purchases you make to the next dollar and invest the difference.

Robinhood

Robinhood’s goal is to make you rich without making brokerage firms richer, by letting you trade without commissions and fees. The real benefit of Robinhood is that it’s fast.

Stash Invest

Stash Invest is also designed to let you deposit just a little money at once so you can invest consistently over time. Stash also provides a lot of educational information to help pick investment options. It offers ready-made portfolios with themed investment choices, such as “Clean and Green” or “Defending America.”Choosing can be a little more work upfront than other apps. But it also gives you a strong basis for moving on to more advanced investing by educating you on the culture of investing.