You are allowed to
UI Material grants you an irrevocable, nonexclusive, worldwide copyright license to download, copy, modify, distribute, perform, and use photos from UI Material for free, including for commercial purposes, without permission from or attributing artist of UI Material. This license does not include the right to compile artworks from UI Material to replicate a similar or competing service.
API Usage for businesses we offer special custom plans. They come with fixed fees, fair usage policy, priority support and optional yearly bank payment. Contact us at email@example.com