Add it to your Home Screen for full-screen, offline access — in Safari:

1. Tap the Share button — a square with an arrow pointing out of it. It's in the bar at the bottom of the screen, or at the top right if Safari's address bar sits at the top.
2. Scroll down the panel that slides up. The row of apps is not the whole list — Add to Home Screen is further down, which is the step most people miss.
3. Tap Add to Home Screen, then tap Add at the top right.
4. Open Own Vault from its new Home Screen icon. Use that icon from now on, not this Safari tab.

Other iOS browsers can't install to the Home Screen — open this page in Safari first.

The Home Screen app has its own storage, separate from Safari. It starts with no vault, so you connect it again once it's there. Copy the setup code now; you also need your master password.