TNMaker is an iPhone application developed by Vinh Le. It falls under the category of Education & Reference and is available for free. This app is designed to assist teachers in grading multiple-choice tests quickly and efficiently. With TNMaker, teachers can use their phones to mark students' tests instead of manually grading or using a dedicated scanner.

One of the key features of TNMaker is its ability to review, sort, and share test results immediately. Teachers can easily customize the number of questions and assign the correct score for each question. The app allows for seamless sharing of results via platforms like Facebook, Zalo, and Gmail.

TNMaker also provides a review feature, allowing teachers to review their answer key and individual student answers. The app offers options to delete or share the results via social media platforms. Additionally, there are settings to customize the number of questions and access video tutorials for assistance.