Do I need a separate chime if I already get phone notifications?

Many buyers add a plug-in chime precisely because app push notifications can lag or be missed when your phone is silenced. A chime gives you an immediate in-home audible alert, which verified-purchase reviewers consistently cite as the main reason to buy one. If you only rely on your phone, you may not need one, but multi-floor homes and households that mute phones benefit most.