In the past, everything has been tied to your Flica username. However, there are new features that can't be implement without accounts. Going forward, you'll be able to keep track of things like your schedule history, even if you leave your airline or delete the app. We've also got some new features that we're excited about getting to work on that will require accounts, along with many other things that have been sitting on the todo list for far too long.
If you have any questions about this or anything else, please send us an email to firstname.lastname@example.org