The SkyApp M+ mobile app is a part of an aircraft booking system made for internal use. Users of the system who have certain privileges can book aircraft for which they are licensed. Reservations may be added through the SkyApp M+ apps calendar view, and also pilots can check when is each aircraft available. The system provides pilots with their inactive and deleted reservations in a list view, and have the permission to edit or delete their active reservations. The purpose of the system is to allow pilots to reserve aircraft for different periods of time on mobile devices quickly and easily, make their availabilities visible, and to inform pilots about any hindering factors, booking modifications or upcoming booking periods.