The download of the app is safe and secure. 株式会社 ビクセン is the developer of Planet Book which relates to the Educational category. Over 10K users downloaded and set up the tool and its latest release was on Oct 22, 2020.
On Google Play, this application has been rated 4.6 by its users. Get the installation package of Planet Book 3.1.1 for free and have a look at users' reviews on Droid Informer. The app works flawlessly on Android 4.4 and above.