Free for private and commercial use.
The author of the font is not responsible for damages or claims of third parties that may arise in connection with the use of this font.
Font JDK Don Digit (c) Jakub D. Koci, jdkfonty.mozellosite.com.
(If you want and can, include in the circulation of your print or project. This way you will help spread awareness about these free fonts. If you don't mention it, nothing happens.)