HD Profile Picture Downloader is an Android app developed by DMY Video Downloader. This free app allows you to zoom into Instagram profile pictures without requiring you to sign in. You can easily download the profile picture of any Instagram user by copying their username and pasting it into the input text box. Alternatively, you can search for the user by their username within the app.

This app is fast and easy to use, and it allows you to view full HD photos in their original size. You can bookmark users to receive notifications about their profile picture updates. Additionally, the app provides a "Copy Profile URL" feature that opens the HD profile photo for you. It is important to note that this app is not affiliated with Instagram™ and that re-uploading images or videos is not encouraged.