On iPhone / iPad (Safari)

1. Tap the Share button
2. Choose "Add to Home Screen"
3. Tap "Add"

On iPhone, installation is done from the Safari browser.

On Android

1. Open the browser menu
2. Tap "Install app" or "Add to Home screen"
3. Confirm installation

Samsung Internet: menu → Add page to → Home screen.

Firefox: menu → Install.

Open this site on your phone or tablet to install it as an app.