QuickKey is a popular iOS and Android app that can help you save a ton of time when grading multiple choice or true/false quizzes. I first learned about it a few years ago when a colleague of mine was raving about it on Facebook.
Here’s the basics of how it works; create your quiz on the Quick Key website then print and distribute a bubble sheet. After your students have completed the bubble sheet you simply scan the sheets with your phone and the grading is done for you. As you can learn in the video embedded below, QuickKey will work on the cheapest of Android phones as well as on more expensive Android phones and on iPhones.