It is necessary to develop an application for Android and iOS which will show the graphics taking data from the server. Additional Features - receiving payment (connection to standard API service), chat/feedback. Sample and description is available.
53 фрилансеров(-а) готовы выполнить эту работу в среднем за $1213
Contact me. I can help you. I also have experience in working on a similar application. I can get it done before deadline. Let me know if you need any help?