Free Language Exchange with Native Speakers

Listing Details

I am selling a mobile application in the field of education (language exchange between native speakers). You can learn, for example, English from a British resident in return for teaching that person Spanish. Sounds fun, doesn't it? :-)

Price: I am interested in reimbursement of the costs of the developer and graphics (9800$).

Registered users: 3000

Application: Android and IOS

The app has no added payment modules, so it cannot generate revenue at the moment. 

Possible ways of monetization:

a) subscription payments for premium users for additional functions, e.g. unlimited translations inside the application, searching for other users by location, selecting specific parameters when searching for users, etc. (the application should be expanded - additional cost approx. 600 $)

b) advertising for free users

c) sale of language tests

d) commission from the sale of lessons with professional teachers

How can the buyer take this project further?

New owner should concetrate on building community around app. It would be great to integrate Stripe payments. App can charge premium users for extra features on monthly basis.