For a handy backup option on iOS devices, just go to the IAP web site from Safari, then tap the "share" icon at the bottom of the page. From the options list that pops up, select the "Add to Home Screen".
That will put an IAP icon to your home screen so a single tap on that icon will immediately launch IAP within Safari without having to manually start in Safari and entering the URL each time. If you select "Remember Me" in the login options, the shortcut icon will also have you logged in as soon as the IAP site appears.