Hi, I can help you to develop a flutter application for ios and android were app will have main page with "tap to start button" which will navigate to the second page which will have two option like which will have 2 options with toggle button, One option will get image from phone gallery and with other option we can upload image from camera. once the Image is selected it will show process button, on click, it will convert image to BASE 64 string and send to api and display the callback result to page.
Kind Regards,
Anil