http://www.alphr.com/realworld/376090/which-type-of-facebook-ad-is-most-cost-effective
https://www.facebook.com/business/help/214319341922580
https://www.facebook.com/business/help/318171828273417
When Advertising on Facebook you can choose two types of Ad Budgets, and daily one or a lifetime one.
The daily one is where you have a set amount to spend a day, (this is one I chose) and my limit was £10 a day. Where the lifetime you run your ad for a specific length of time and pace your spending over this time.
In App Advertisement:
https://www.quora.com/How-much-does-it-cost-to-advertise-on-a-mobile-app
https://www.google.co.uk/admob/monetize.html
http://getappcase.com/blog/app-marketing/in-app-advertising
Room hire:
http://www.lincolndrillhall.com/room-hire/room-hiring-facilities/
This is where i would be using a room to pitch and promote and my app.
For a day rate of £118 it will include:
”Located on 1st floor but with both lift and staircase access
Sprung wooden dance floor – ideal for dance workshops/rehearsals, auditions, castings etc
Can also be used for mid-scale meetings, training and workshops.
Up to 55 people theatre style, 30 people boardroom or cabaret style.
Room has own kitchen facilities ”