Gett is one of the simplest and fastest ways to make a taxi order. The mobile app service will provide you with a taxi within 15 minutes. Until that you can monitor the car's location. They take payment according to the time of the trip. You can pay both by credit card and by cash.
We would like to note, however, that taxi apps in Sochi work in a special way. The competition with local private drivers is too high. So be prepared that Gett just will not be able to serve you on some addresses.