You can earn up to $600 in a year through Current, and there are plenty of different ways to rack up rewards. First off, as we mentioned, you earn rewards for listening to music, and Current allows you to play songs from your lock screen. You can also complete surveys, watch short ads, or refer friends to the app to bring in even more cash. You can get up to $250 from referrals, and also get an additional 5 percent of whatever your friend earns on the app!