If you just need to casually get your nails done for a regular day basis, and not for a spa day or any special occasion, I would highly recommend
@Tips and Toes. They are located throughout the city, and have a cheaper price range compared to most day spas here in Dubai. Also, their customer service is amazing, and the skills their workers have are incredible. They do the job well, in a sufficient amount of time. You don't even want the treatment to be over. Most of the time if I am in a rush and forget to book an appointment beforehand, they always have a free spot, or a employee to help you out. They also have a reward cards system which gives you an incentive to always go to them for any of your "feminine" needs.