Oman has two taxi companies - Marhaba and Mwasalat - and each have their own ride-hailing apps. Currently, they are only allowed to pick up passengers from the airport and most hotels, and the only operate within Muscat.
Oman’s orange and white privately owned taxis are typically found along the main roads of every city and major town, but be warned they are not fitted with meters so you should agree on the fare with the driver before you start your journey.
Car rentals in Oman are reasonably affordable and their services are available everywhere, including airports. Keep in mind that you do need a driver’s licence (issued from your home country) and cars are driven on the right-hand side, meaning you overtake on the left.