Creating a structure for your app, however, can take a lot of time and energy, unless of course, you have the right tool in place. That is why many mobile developers start out with a mobile app wireframing or mockup tool. Mobile app wireframes can not only help save valuable time (and money!) but also help developers focus on the user experience.
https://mopinion.com/mobile-app-wireframing-mockup-tools/
Have you ever wondered this: what is the best way to plan and map out the layout and structure of a website or mobile app? Or how you should go about showing, explaining and proving to people that your ideas and/or concept will work before you start working on the prototype? If you do it verbally or in writing, you leave a lot of things to people’s imagination and there’s bound to be misunderstanding. The answer is to use wireframing tools to make wireframes.
https://mopinion.com/top-20-design-wireframing-tools-an-overview/