Have you seen the difference? Yes, the objective is measurable.

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Well, the objective of the e-learning mobile app is to get 1 million users in the first 2 years of the mobile app being launched, create an online cross-subsidy program of 30% of the total users, and many more.

Come on, try now to determine the purpose and objective of creating a mobile app using react native that you are planning.

How? Have you done it yet? Now decide, you will create a mobile app using react native by insourcing / outsourcing. Of course each has its advantages and disadvantages. If you are confused, try reading the SoftwareSeni article belgium email list that discusses insourcing / outsourcing .
Finalize the wireframe & test the mobile app prototype
Now , for current technology, UI/UX designers usually use the figma tool , for the final wireframe & storyboard stage. The difference is, here it has started to be added with assets in the form of logos and dummy images. Actually, figma is just one of the many tools & platforms that you can use, Adobe XD for example.

If you intend to use figma as a platform to create wireframes & storyboards, you can create a clickable button simulation. So, the flow of the mobile app will be clearer. Usually, Software House , especially in SoftwareSeni, calls this stage the mock-up stage.

After the mock-up is successfully built, you can't just launch the product. The product is still in prototype form. You really have to be careful, whether the storyboard and wireframe of the mobile app are appropriate. And so on.