Shadowing上級 is an Android app developed by Mezon Studio. It is a shadowing practice app designed for intermediate and advanced learners of the Japanese language. With this app, users can practice Japanese shadowing on the go, without the need to hold books while listening to CDs or sit in one place to practice on the computer.

The app comes with a feature that automatically calculates the amount of time you have spent learning. This is a great way to track your progress and keep yourself motivated. Additionally, the app now supports English, Vietnamese, and Indonesian languages, making it more accessible to a wider range of learners.