When users connect their credit or debit cards to the app, Acorns will automatically invest any spare change they have into a diversified portfolio. Rakuten, formerly known as Ebasattakigates, is another excellent app for generating passive income because it allows users to earn cash back on purchases made at thousands of online merchants. Users simply shop through the Rakuten app or website to earn cash back on their purchases. Also, a well-known app for passive income generation through the rental of extra rooms or properties is Airbnb.