The Drops app allows you to donate the spare change from your credit and debit purchases to charity. The startup links up with your bank account and rounds up every purchase you make with a card. You can choose your charity, which allows you to support a cause that resonates with you, whether it's human rights, access to clean water or disaster relief.
There is also the option to set a limit or donation goal, with a minimum of only $5. The Drops app doesn't take a cut of your donation, so you can be sure that you are making a direct impact. However, you can tip the team after every single donation, and you can choose how much that tip is for.