According to the antivirus report, the app doesn't contain viruses or any kind of malware. Kodeksy has been originally designed by mokrzycki.eu and it is included in the Educational category. Google Play shows that the tool is rated 4.4 by its users.
The developer released a new version of the app on Nov 8, 2019 and over 10K users downloaded and installed this application. Take the opportunity to download the .apk installation package of Kodeksy 1.315 free of charge and check out users' reviews on Droid Informer. The installation package occupies 4 MB on disk and it runs on Android devices 5.0 and higher.