It is possible to add a new opportunity without scanning the business card. There are some fields that are mandatory in order to make the app save the opportunity.
When generating an opportunity simply:
1. Fill out the 'Name',-field
2. Fill out the 'Company'-field
3. Fill out the 'Email'-field
4. Fill out the 'Country'-field
5. Click the Back-arrow in the top left corner in order to save the opportunity