apologies for ignorance and lack of sophistication here. but do the safari push notifications (apn) apply to and work on all devices including ipad and iphone? i.e., if a site doesn't have an app, or if a person (a site user or subscriber) doesn't want to use an app, can the site send push notifications to that person that the person can receive on his ipad or iphone? apologies, again, for what's probably obvious -- but any clarification greatly appreciated.