What's a good Android app for earning a bit of extra money on the side?

Swagbucks Play Games + Surveys is a long-established platform designed for users seeking to earn modest supplemental income through their smartphone. The core appeal lies in its dual approach: users can either engage with a rotating library of casual games or participate in market research surveys, all while accumulating SB points. These points are then redeemable for PayPal cash or a wide variety of gift cards from major retailers. A key feature for efficient earning is the Discover section, which aggregates specific game offers with clear payout targets, such as reaching a certain level. For instance, a user might install a featured puzzle game, play it to level 50 within a week, and receive a lump sum of SB. However, user reviews indicate a recurring issue where progress tracking can be inconsistent, with some offers reportedly becoming unavailable before their stated expiration. This can lead to frustration, as one user noted, 'It's not tracking all my progress either.' Despite this, the app maintains a relatively high rating because many find the process straightforward and the redemption system reliable for small, periodic rewards. It functions best for those who already play casual games or have downtime for surveys, turning existing habits into occasional payouts rather than as a significant income source. The interface is generally simple, though some offers can be buried among less valuable ones.