From the home page, tap on the Add Trip button. Then tap on the TripIt icon at the top right to connect Packr to TripIt.
The TripIt button can be hidden from the Settings. From the home page, tap on the menu button at the top left, then on Settings. Scroll down and toggle the switch next to Show TripIt Button.
No, Packr only retrieves data from your TripIt account, but does not make any additions/modifications/deletions. Your TripIt account is safe!
If your TripIt account has no password, because you usually log-in using another provider's account, you need to manually set a password for your account. Visit TripIt Account>Change Password page to set a new password.
Unfortunately Packr can only create single destination trips when retrieving your next TripIt trips. We are planning TripIt multi-destination trips for a future update.