Android mobile app login/password overriding a new Web-server module

I have an old APP designed to work with a GET/POST WEB-SERVER module already designed and working for Old module connection. I attached old APK file to this detail message. After installing app on your phone please click the SETTINGS ICON bellow at the left corner. then please use login: admin, pw: admin, email anything, IP type this in same row: [login to view URL]:8895. 1. You will be redirected to old ORANGE WEB-SERVER and able to getting to WEB-SERVER module. 2. to test normally please to the a normal web-browser like Google or Firefox and in the search BAR type the existing IP: [login to view URL]:8895. you will see the WEB-SERVER html home page asking for LOGIN and PASSWORD which is the same as you typed on APP before (admin/admin). WHAT I NEED; 1. I need to use this same APP for my new WEB-SERVER but this new WIFI-server does not work as old WEB-SERVER it does not use GET/POST so maybe there is some other solution. example that to do: I HAD another developer that he delete the LOGIN/PASSWORD links so it will go directly to IP address but then he save the login/password on the GOOGLE or Firefox and save settings but not a good IDEA, why? because if the WiFi module is power OFF and then ON when opening the WEB-BROWSER IT ASK AGAIN FOR CREDENTIALS NOTE: so please try to make it work like the old module (the APP will bypass or override the WEB-SERVER credentials) I am willing to pay from $0 to $25 maximum