NEED CALENDAR EXPERT ! BOAT CHARTER CALENDAR

Hello everyone , I work for a boat charter company and we need a calendar that can help us with our client bookings that works well on the iPhone and tablet.. I have had trouble getting the calendar to do everything I need it to do on most calendar Apps.. Google calendar - doesn't work well enough on the phone its too complicated to see available boats and reserved boats .(unless someone knows something I don't know?) Bed-booking app - doesn't let us select only a day -(we have to select day and night) Ical - too simple It is really important that we see available boats and reserved boats on one page it is also important that each boat can be selected individually , and therefore we can review yearly progress for each individual boat. We are open to paying for a calendar after a 14 day trial as long as it does everything we need it to do . thanks