WhatsApp is how almost everything gets arranged in Zanzibar. A single well-written message usually gets a confirmed price within minutes.
What to include
Date, pickup time, flight number, the number of passengers and pieces of luggage, exact pickup and drop-off points, and anything special: child seat, extra stop, oversized bags.
If you want a return trip or a full-day tour, say so in the same message so the whole stay can be quoted together.
A message you can copy
"Hello, I'd like an airport transfer on 14 June, flight KL569 landing 15:20, 2 adults and 1 child (age 3, child seat please), 3 suitcases, to Kendwa Rocks. Return on 21 June for a 17:00 flight. Could you confirm the total price?"
That is everything needed to give you a firm quote without a second exchange.
Confirmation
You should receive the fixed price, the vehicle, the driver's name and where you will be met.
Save the number. On the day, one message tells you your driver is already waiting.
Need a driver for this trip?
Fixed price, clean non-smoking car, licensed taxi driver. Tell us your dates and we reply with a quote.