Users can increase their savings over time without actively managing their investments with this laissez-faire approach to investing. Ibotta, an app that offers cashback rewards for everyday purchases and grocapk gamery shopping, is another earning tool that presents prospects for passive income. By scanning their receipts and taking advantage of special offers on particular goods, users can get cashback. Ibotta also has a referral program that lets users earn extra cash by introducing friends and family to the app. Airbnb is another well-known app that lets users generate money by renting out a spare room or other property.