This is an exercise app which calculates and aggregates averages and totals of my costs related to flights, buses, trains, hostels bookings.
In order to do something useful (at least for myself) and - at the same time - learn as much as possible, so that maybe someone will give me a chance eventually.
Go to registration page (demo on Heroku) and create an account for yourself. You will receive an activation link on your email address. If you are a frequent flyer, then this app might be helpful in calculating/averaging your bookings' expenses.