How to create an image uploading app?

Hello kodular community. I am looking for this topic but did not find anything useful. I want to make an app in which a user upload a image in the app and the image saves in the app gallery so anybody with app installed can see it. Please tell me how to create this. Any link to example.
Thank you.

You can use ImgBB Host and the extension to upload the images, after each upload it returns the path file which you should store in a directory or firebase

Thank you so much. I will check it out