Make a Simple Bluetooth App for Android & IOS to connect to Raspberry Pi and send info

Need a Developer to develop an Android & iOS Bluetooth App which Connects to Raspberry Pi Bluetooth App to Save a Default Wifi Network Credentials to Raspberry Pi The Bluetooth App should connect to the Raspberry Bluetooth Module and have to send information such as Wifi Name and Password to the Raspberry Pi which the Raspberry Pi should make as default Wifi Network to Connect The app should also have the facility to overwrite the Default Wifi Network Credentials if the app user need to change The users should have to have a elegant UI to input their Wifi Credentials or simply to pick a wifi network from his Mobile and input the password which later the Raspberry makes as default Wifi to connect UI : Dark Theme , with minimalistic design Upwork Developer Requirements: Android Development, iOS Development, Raspberry Pi Since it is a simple project and lots of source codes are available online I would like the bid to be low as possible