Yes, you can make money from apps. Some apps will pay you for doing your onlineshopping using their app. Others will pay you to fill out surveys, or to scan your receipts from your in-store purchases. Others will pay you to perform small tasks, or to partake in the gig economy (dog walking, ridesharing, etc). Others you can use to sell your stuff, and then get a payout when it sells. It just comes down to deciding how much time you have to invest, and how much you want to make.