Install POST on your iPhone
In Safari, open POST at its usual website address.
- Open the Share menu (it may be inside Safari’s More menu).
- Choose Add to Home Screen. If it is missing, use Edit Actions to add it.
- Keep Open as Web App enabled if Safari offers it, then tap Add.
Launch the POST icon from your Home Screen. You may need to sign in again. After an account flow opens Safari, finish there, then return to POST and check your session.
POST needs an internet connection. You can also keep using it in Safari.