Dear Juan,
Thank you so much for your reply.
Kindly note that I want to use Moodle Mobile official app with my own Airnotifier server to push notifications to Android devices only. Still I don't use certificates which are needed for iOS push notifications as I think.
I noticed your replies in below threads that support above point:
https://moodle.org/mod/forum/discuss.php?d=327778#p1318428
https://moodle.org/mod/forum/discuss.php?d=276849#p1191887
https://moodle.org/mod/forum/discuss.php?d=276849#p1245684
https://moodle.org/mod/forum/discuss.php?d=276849#p1246287
May you please eliminate confusion or misunderstandings?
Thank you very much.
Best Regards