Whale Watching App Development

I need this as a personal app that will automatically record time date and gps location
The user then can add details such as number, species, distance from shore, boat sighting, calf present, direction of travel and a few other things
Thus app is only fir a select group
And will need to send an email to a central email and record gps and sihtting number on a map.
Each sighting must have its own individual sighting number. For example 252607/1
(Year, day,month,/individual number