On each iPhone, open this site in Safari, tap Share, then Add to Home Screen. Open the new icon and sign in there. Each phone needs its own initial download while online.

Logins are issued by WRC. If you were given a temporary password, you will set your own on first sign-in.

A simple phrase is fine. Use 12–128 characters; symbols and hyphens are not required. After saving, use your new password on your other phone and laptop.