Install the app

One-way Valve is a Progressive Web App: install it and it opens in its own window, full screen, and keeps working offline. Here's how, on each kind of device.

Android — Chrome

In Chrome:

Tap the menu (top right).
Choose Install app (or Add to Home screen).
Confirm, and it lands on your home screen.

iPhone & iPad

Tap the menu (Safari).
Tap the Share icon from the address bar.
Tap View More.
Scroll down and tap Add to Home Screen.
Tap Add.

Desktop — Chrome or Edge

Click the install icon at the right of the address bar, or the ⋮ menu → Install One-way Valve.
Confirm, and it opens in its own window.

Safari and Firefox on the desktop don't install web apps, so there's no install there — the site works the same in the browser.