Blog How Do You Design Apps That Delight Users—and Generate Steady Developer Revenue?
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How Do You Design Apps That Delight Users—and Generate Steady Developer Revenue?
Developer Sharing April 25, 2025
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In the fiercely competitive app market, not every app can become a breakout hit, but every app can be designed with the most suitable monetization strategy.

In this blog, let’s talk about how to make a game or app that can not only make users happy, but also allow developers to make stable money.

What kind of experience can make users happy?

In game and application design, user experience determines retention rate, which is the basis of revenue development.

Game experience: The game rhythm is immersive, players play smoothly during the game, and there are no ads and pop-ups to interfere with emotions; the reward feedback mechanism is reasonable, and players will not have negative emotions due to the cumbersome reward process; players who pay can have a better experience, but players who do not pay can also play the game smoothly.

Application experience: The application design is clear, and users can quickly find the functions or content they need in the application; the interface loads quickly, without extra ads and pop-ups; it runs stably and will not be suddenly interrupted.

This means that highly interfering monetization methods (such as forced advertising) are often the “killers” of user experience.

How to achieve stable profit?

Currently, the following problems have arisen with traditional monetization solutions:

Advertising: Interfering with the experience and causing users to exit

In-app purchases: The proportion is extremely low, and the number of users who pay is less than 5%

Subscriptions: The threshold is high, and users are prone to churn

Is there any way that is completely non-interfering to users but can provide developers with stable profits?

Yes, innovative SDK monetization tools, such as CastarSDK.

How does CastarSDK achieve developers’ vision?

CastarSDK is an in-app monetization tool that runs silently in the background with minimal resource usage, generates stable revenue with idle broadband resources, has no ad pop-ups and click tasks, and does not cause user loss.

For users, they can immerse themselves in playing games, listening to music, or using tools; for developers, you no longer have to make money by disturbing users, but by relying on them to use and play for a long time to continuously obtain passive income.

Create pleasing and steady-earning Apps or games with CastarSDK

esign principle: The longer the user uses it, the more you earn, but the user is unaware of the process of making money.

First, optimize the stability of the background operation to ensure smooth operation of the app and low crash rate.

Secondly, increase the user’s usage time, set idle rewards or advanced function guidance.

Finally, design a solution that allows non-paying users to use the game for a long time.

For example, if you develop a small simulation game without inserting ads or forcing in-app purchases, after integrating CastarSDK, developers can generate stable revenue in the background regardless of the player’s operation. Such a game does not interrupt the experience, improves the retention rate, and improves the game’s reputation. The developer’s revenue is also more stable than when relying solely on ads.

Make Your App’s Revenue More Reliable

When monetization doesn’t disrupt the user experience, users enjoy more, your app lasts longer, and you earn more steadily as a developer.

Your app doesn’t need to become the next hit. You just need to use tools to create a profit plan that doesn’t disturb users but continues to generate revenue. CastarSDK is that quiet and powerful revenue guarantee tool. It builds an invisible bridge between developers and users, connecting experience and revenue. No need to disturb, no need to click, the longer it runs, the higher the revenue.

Lisa