The app is no longer supported.
For those who bought the application before January 1, 2018, offer promo code for a free trip in the new advertising https://play.google.com/store/apps/details?id=com.grydmitrij.ticketpdddemo application. Offer is limited due to Google policy (for the quarter is not more than 500 promotional codes). Accordingly, if someone does not have time, it does not mean that he will not be able to get your promotion code. He just have to wait no more than three months.
To obtain this code, write to gry-dmitrij@yandex.ru or https://t.me/pddbilety.