diff --git a/MobileFilter/sections/specific_app.txt b/MobileFilter/sections/specific_app.txt
index d5b086eea72..cf9eb630f13 100644
--- a/MobileFilter/sections/specific_app.txt
+++ b/MobileFilter/sections/specific_app.txt
@@ -18,6 +18,7 @@
 ||graph.facebook.com^$app=com.booking
 !
 ! Blocking Facebook mobile ads
+||graph.facebook.com^$app=com.popularapp.periodcalendar
 ||graph.facebook.com^$app=com.psy.chigs7.psychologyfacts
 ||graph.facebook.com^$app=com.notizie.libere
 ||graph.facebook.com^$app=com.homemade.ffm2