Cosmonia is the official developer of Експеримент which can be found in the Books & Reference category. Over 100 users downloaded and set up the tool and its latest update was on Sep 4, 2019. Google Play displays that this application is rated 4.8 by its users.
You can download the installer of Експеримент 1.1.1 for free and take a look at users' reviews on Droid Informer. The app requires Android 4.0 and higher. This download is completely safe.