Anyone who’s familiar with best practices in design fields knows how important it is to commit time and resources to UX development. How people feel when they use your UI has a significant effect on the actions they take and the opinions they form, which of course affects conversions, profits, and overall business success.
http://theuxblog.com/blog/ux-rules-for-tech-startups/
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/