There is a huge difference between the methods we use to boost an app or a game. Apps fulfil any need of users and games provide entertainment. Behaviour of app users and game users are totally different. And usually games do not have searchable titles.
Charges also depends on the state of your app, if its an old app with good size of user base or a fully new app.
Get in touch with us and one of our team member will send you a quotation which will be very reasonable by looking at the value we provide.