Mobile apps have gotten this middle stage in the business world, and there is no scope for mistakes at this ever-growing contest. Mobile app usability is one that most important characteristic of any mobile app that does the app differentiate from others. Making sure that the app is accessible for the users and they are able to accomplish the work more conveniently is the required step. According to the new numbers, 88% of those users never move to the app if they encounter any usability issue. Also, nearly 70 percent of these businesses experience failure because of usability issues in their app. In present's world where hundreds of apps have been produced daily, that users don't get the time to abandon any app if anything gets wrong. To make sure that the app doesn't get into that uninstall garbage room, you want to remove the possibility of glitch, failure or complex ways causing the suitability problems. The poorly designed app doesn't only change the people's perception of the app; it reflects poorly on the whole brand. Since most users today are moving, the quality, helpfulness, and usability of the mobile app reflects directly back onto the organization. Some people mistake UX designing with usability and vice versa. Still, mobile app usability is one aspect of UX that acts into the general relation between individual and product. UX determines all aspects of the person's knowledge of the mobile app, including usability. Mobile app usability is related with the strength, efficiency, and ease of reaching goals within this app. This superior mobile App interface design should have two features: Simplified, and be easy to use. This is also the duty of designers to create such beautiful mobile Apps with good user experience innovation. The greatest App Ul design should be simple and useful to provide adequate data for users by this gorgeous surface design Also, the important element to make an impressive visual effect to users and make them continue for it and download it. On the contrary, if these users look puzzled and don't understand this design idea, that would be the failed UI design. Mobile app usability encourages learn ability. The successful mobile app should be spontaneous t should take very little time for the person to reach a certain level of familiarity with the surface If the person encounters the issue, the result should be easy retrievable. Take on boarding to guide users through this mobile app to improve usability, also as recover from mistakes. Usability testing is another important part of app design/development and it is related with those arguments that are difficult to quantify or categories. Mobile devices are tiny and have very few personal buttons, so apps need special effort to turn into enjoyable and useful.