What are the appropriate prototyping tools to use for mobile app development?

Advantages of Rapid prototyping: (1) The prototype system has been validated by interacting with the user, and the resulting specification document correctly describes the user's needs. (2) Developers can reduce errors through continuous improvement.

In today's world, more and more people are using mobile phones, not only to contact others, but also to experience the different appson the phone, there are many kinds ofapps , there are games, movies, shopping and so on, But these apps have a purpose, which is to bring convenience to people, because now more and more apps are being developed, developers are no longer aware of the needs of customers, so I think, in the development of developers, Using rapid prototyping model to develop a better, in a prototype is developed, you can immediately to the customer experience, after the experience, the customer will be based on their feelings to the evaluation of the software, which is the customer's needs will slowly reflect, then the developer of the first prototype function expansion, Then again the software model upload to the user experience, through continuous improvement, and finally get a user satisfaction of the APP, this way can be quickly developed and perfected, but rely on the user, only through them to know the software is insufficient and redundant, In the development process, developers can learn a lot of things, in the design and coding phase error is less likely, reducing the need to correct the previous phase of the error in the next stage of the possibility.

What are the appropriate prototyping tools to use for mobile app development?