Vigorous eyes!2 is an Android app developed by Mtk available for free on the Google Play Store. The app is categorized under Lifestyle and subcategorized under Health & Fitness. The app is designed to help users stretch their eyes with the "Looking upward and closing opening method". The app comes with a warning that users should stop stretching if they feel bad.

One of the features of Vigorous eyes!2 is the Volume Flick-Control. Users can control the volume of their device by flicking up, long flicking up for maximum volume, flicking down for volume down, and long flicking down for mute. The app also includes an Enduser license agreement (EULA), which can be found on the developer's website.

Overall, Vigorous eyes!2 is a useful app for users who spend a lot of time looking at screens and need to take a break to stretch their eyes. The Volume Flick-Control feature is an added bonus for users who want to control their device's volume with ease.