Pictures stay off this phone
Friends send pictures to your link. They unlock only in the Get Done browser extension on your computer, one for each question it sees you finish. This app never shows them.
Friend link
Pictures unlock wherever you do the homework, one per finished question.
On your computer, open the Get Done extension, choose "Use a link from my phone" and paste the code. Keep the code private.
Works in Chrome and Safari. Add it to your home screen to use it like an app.