Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to develop exclusive smartphone application for users [title] Use an accessible interface. [step] It is very important to think about how to make development process simple and user-friendly. In this era, people like to prefer things which are easy to use, attractive, time-saving and simple.

Ending1: This means making mobile applications only accessible with connected interface. The freedom to create a simple mobile application is incredibly important to many users. Ending2: Thus, you have to make interface of the application very user-friendly so that users can easily access all important features of apps try to use user interface. [title] Focus on latest technology and market trends. Ending3: Access the " application " page, or any other preferred interface page and get to know how to use a user interface. Make sure people are in the category of either " titles and templates ", " ability to use ", etc. Ending4: To develop more complex applications, develop offline interface and be able to replicate and categorize important information like meta information. [substeps] Use an online interface such as online chat shop function.

Answer format: ending1/ending2/ending3/ending4