Fonts used on tuckpack.app

D-DIN, D-DIN Bold, D-DIN Condensed Bold, D-DIN Exp Bold
  Copyright (C) 2017 Datto Inc. https://www.datto.com/fonts/d-din
  SIL Open Font License 1.1 (OFL-1.1.txt). Unmodified WOFF2 files from the official release.
  "D-DIN", "D-DIN Condensed" and "D-DIN Expanded" are Reserved Font Names.

osifont
  GNU LGPL 3 with GPL font exception. See osifont-NOTICE.txt, LGPL-3.txt and GPL-3.txt.