Https://surveys.google.com/google-opinion-rewards/ This will be your most legit option. Source: 6 months ago

They have one already you only get play store credit though. Source: 12 months ago

Since people are asking: This one? https://surveys.google.com/google-opinion-rewards/ (links to Apple and Google downloads). Source: about 1 year ago

Little trick I figured out a while ago, I answer Google Opinion Rewards every time I move around my city, which pays 10 to 75 cent on my google play balance and then can be used for youtube subscription. I get 5$ a month easy in my small City, with barely a work commute every now and then plus groceries. Easiest way to support your favorite cult. Source: about 1 year ago

This is a super oblique way to do it, but I've gotten a couple for free over the years by doing Google Opinion Rewards surveys and buying them off the Google Play store with the credits. Source: over 1 year ago

The problem of scale for profitability from ads is certainly there. You could look to use something like admob to start with to make some money back (although the earnings likely will not cover with cost of marketing, without scale). Source: over 1 year ago

1. AdMob Google is the No 1 player in the mobile advertising market. It was already the largest online advertising company when it acquired AdMob. AdMob makes earning revenue easy with in-app ads, actionable insights, and powerful, easy-to-use tools that grow mobile apps. - Source: dev.to / almost 2 years ago

Use online services, such as Google AdMob, for filtering and sorting in-app ads. Source: over 2 years ago

There are different ways to monetize with your Flutter app. You can make users pay to download it, you can have in-app purchase plans, you can let users subscribe using recurring payments to use all the features, or you can show ads to your users. In this article, Dhruv Nakum teaches you how to integrate AdMob into your app. - Source: dev.to / over 2 years ago