Creating a mobile application turnkey

The services of a mobile application developer are required. It is necessary to create a mobile application on a turnkey basis. The app is a reference with several cities. The application will contain general information about the city, city news, map, information about companies, reviews about companies, posters, blocks for advertising.
There's a common TK. But I would like to make a full TK with the performer, according to which we will work.
If the TK is justified, the budget may be additionally allocated.
Prepayment is also possible. But this issue will be decided individually.