How do I install ZipGrade? August 19, 2014 18:34 ZipGrade is available through Apple's App Store. To download the most recent version of ZipGrade for free, click here. Related articles How do I download ZipGrade for Android? How do I get started with ZipGrade? I received a License Code (previously referred to as "Purchase Codes"). How do I redeem it? What about ZipGrade VPP? Can I use ZipGrade without a mobile device? Can I use a computer to grade papers?