Amazon S3 is a cloud storage service where you can store any number of objects from anywhere on the internet. We’ll use S3 in this tutorial to store an image uploaded from our Android app and then download and display the image in our app.
Cognito is a sign-up, sign-in, and access control service. We’ll use it in this tutorial to control access to our S3 images. We’ll only allow signed-in users to upload images to our S3 bucket while both signed-in and guest users will be able to download images.