• Booking a cab, purchasing apparel or ordering food online-mobile apps have moved on top of list of con­venience. And hence the responsibility of the app de­veloper increases to design app in a user friendly way. The world of app development is still in its early stage and it is facing many challenges. From huge expertise gap to tal­ent sourcing-app development industry requires an entirely different set of competencies. App development process has one very vital process-designing user interface (UI).It consid­ers numerous factors all leading to maximum user friendly interface. The key to it are-considering limited user’s atten­tion, maximum task orientation with minimum functionalities, backend support and data routing etc.Before deciding to build a mobile app few things should be considered ,for example-sticking to unique design elements and keeping it native to each platform. Sometimes cross-platform development tools are also crucial to reduce development costs without damag­ing the fabric of customer and brand relationship. With the rapid change of app development market, the need of thinking beyond user-friendly designs and interac­tive features has increased. With a huge expanding market, the need of recognizing the customers with own logo, fonts, features, feedback and acceptance, all have to be worked on to etch a memory in the minds of customers. Also, there is increased need of evaluating current UI, user experience, ad­dressing security, changing APIs, selecting correct platform decisions, user adoption and business readiness. Consider­ing all these features and Gordian knots, CIOReview India has come up with a list of “10 Most Promising Mobile App Development startups 2017”. A distinguished panel of CEOs, CIOs, industry analysts and the CIOReview editorial team has closely scrutinized these companies addressing the above fea­tures. We believe that with the help of useful insights from our team of analysts, the plans on paper will sure go to reap results along with viability of your ideas.