notify users3 a visible notification message1 ad bar on top1 add advertise bar on top1 cart deadline notification1 cart notification message1 checkout custom message1 custom notification message1 firebase ios1 firebase push ios1 free shipping notification1 increase revenue1 increase sales1 ios addon1 ios app1 market yourself1 minimum amount message1 mister grizzly1 mistergrizzly1 notification bar1 notification bar bottom1 notification bar plugin1 promotion message1 push notifications1 sale message1 shop1 shop deadline message1 shop messages1 sign up bar on top1 subscribe bar1