Hi Jonas!
Thank you for reading my article. So it sounds like you charge per hour because:
A. It’s difficult to tell the scope of the project up front
B. You’re not sure of the value of the project
C. It’s unclear how much time it will take
I feel like all of these can be resolved by having the right kinds of conversations with the client in the early stage of the project. I’ve just posted a new post about value based pricing which I recommend giving a read — let me know if that article helps give you any clarity: https://medium.com/the-apartment/a-freelancers-guide-to-value-based-pricing-5c7c29580cd6#.4jj9bbkbk
Femke