Can I make money by an advert in my app written in Unity free?

I’d like to buy the full version, but I cannot afford it, I’m only 15 years old. Could I earn some money by using advertisements in my free app? So is it in Unity free forbidden? Thank you.

From The FAQ :

Yes you can create and sell a game with the free version of Unity, without paying royalties or any revenue share. However, the free version of Unity may not be licensed by a commercial entity with annual gross revenues (based on fiscal year) in excess of US$100,000, or by an educational, non-profit or government entity with an annual budget of over US$100,000.

Please also be aware that the feature set of the free version is not intended for the production of professional games and interactive content. Lastly, games made with our Pro trial licenses may not be distributed nor used for commercial purposes.