RedinC is the creator of スタンプえほん which can be found in the Educational category. Over 50K users installed the tool and its most recent update was released on Sep 3, 2020. Google Play displays that this application is rated 3.7 by its users.
In-app purchase items and ads can be found in the app. A free .apk file of スタンプえほん 2.0.1 can be downloaded from Droid Informer and you can have a look at users' reviews on this site. Prepare 29 MB of free space on your device for this app installer and take into account that it works fine on Android 5.0 and higher. According to the antivirus report, the app doesn't contain viruses or any kind of malware.