Did you know... iOS has this:

webapp://

So you can launch "ANY URL" as a full blown iOS application.

Here's how I'm using it:

1. Make a new Shortcut
2. Get it to Open an URL
3. Tell it to open webapp://mail.google.com
4. Add the Shortcut to your lock screen

Bam! Direct access. No Safari guff. Just a full blown app experience.

As someone who has given up on the Apple Developer program, this tiny thing makes web apps that much close to native apps.