In addition, the copyright holders of the Tox Project give you permission to
use and distribute Toxcore in Apple iOS applications which are not covered under The GNU
General Public License v3.0, provided that:
A) On demand, you make the source code of Your Software available under the
   terms of any open source license that is compatible with The GNU
   General Public License v3.0.
B) All distributions of Your Software prominently advertise condition A) of
   this exception.
C) It is otherwise impossible to distribute the application through the
   official Apple distribution channel.
D) Any changes you make to the source code of Toxcore must be made public under The GNU
   General Public License v3.0.
E) All binary releases must be accompanied by a notice of where the user can freely
   obtain a digital copy of the source code.