This download is totally secure. KodaKana is the official developer of the app which can be found in the Productivity category. According to the latest information, 青空文庫ルビDA is rated 4.2 on Google Play.
The developer rolled out a new version of this application on Oct 7, 2018 and over 100 users downloaded and installed the tool. You are able to get the setup package of 青空文庫ルビDA 0.2 for free and check out users' reviews on Droid Informer. The app works fine on Android 4.0 and higher.