Which travel APP development company is better?

If it is a customized APP, first develop and analyze the requirements according to the app you want. At this time, the project only has some abstract ideas, which need to be discussed, studied and evaluated, and the ideas will be split and subdivided step by step, and finally decomposed into clear demand function points; After the demand is completed, the next step is to choose a better service provider. What we are docking is the planning of Dongbai Research and Innovation, which is more in line with the development planning.