The BBC recently wrote this article about the UK government running a trial for GCSE students to receive their results using an app, rather than being given results in an envelope.

https://www.bbc.co.uk/news/articles/cm2e2z1y1pko

As is common for modern news outlets, they didn't link to their sources:

https://tst.issue-education-record.education.gov.uk/about/pupils-parents

https://play.google.com/store/apps/details?id=uk.gov.education.educationrecord

GCSE results day to change for thousands of students with new app

School leaders have welcomed the plans for digital exam grades, but said they would need "seamless" support.

BBC News

Why is this an app? Why isn't it a webpage?

Why would you want it to take up space in your phone's app launcher. What can't be done through a web browser?

Is it because the workflow is for a student to log in to the app weeks ahead of time using a QR code a teacher supplies. And Safari on iPhones won't persist website data for more than a week, therefore preventing use cases like this from working as a web site?

https://webkit.org/blog/10218/full-third-party-cookie-blocking-and-more/#:~:text=7%2DDay%20Cap%20on%20All%20Script%2DWriteable%20Storage

@owa

Full Third-Party Cookie Blocking and More

This blog post covers several enhancements to Intelligent Tracking Prevention (ITP) in iOS and iPadOS 13.4 and Safari 13.1 on macOS to address our latest discoveries in the industry around tracking.

WebKit
@ccouzens Ironically I read this immediately after an article about smartphone bans for the under 16s