Vigorous eyes!2 is a free Android app developed by Mtk in the Lifestyle category with a subcategory of Health & Fitness. The app is designed to support eye stretching with the TSUBO massage technique, and what makes it unique is that it features VOCALOID characters to guide you through the exercises. The app includes popular VOCALOID characters like HATSUNE MIKU, KAGAMINE RIN, KAGAMINE LEN, MEGURINE LUKA, GUMI(Megpoid), SeeU, KAITO, AKITA NERU, YOWANE HAKU, KATANE TETO, and MEIKO.

The app provides a fun and interactive way to stretch your eyes, and the exercises are easy to follow. The TSUBO massage technique used in the app is an ancient Japanese method that helps to relieve tension and improve blood circulation around the eyes. However, the app comes with a warning to stop stretching if you start to feel unwell. Overall, Vigorous eyes!2 is an innovative app that offers a unique way to take care of your eyes while having fun with your favorite VOCALOID characters.