No! The app is totally free to use! There is not cost involved for the user!
No! You pay as usual at the field premises as soon as you finish the game. The amount you need to pay is shown at your booking page inside the app.
KARMA is a percentage point rating of each user which is influenced based on your reliability. If you cancel one of your bookings just before the game starts or even if you do not show up without canceling your booking your KARMA is affected in a negative way and there is a chance that your future bookings will be rejected by field owners due to your low KARMA points. On the other hand, if you show up on your bookings and do not cancel them at the very last moment, your KARMA points will remain high!
This is not possible yet. Only if both teams are present you may proceed with your booking.
This is not possible yet. You need to have all necessary players in order to book a field.