Get the installation package of Čj 13.0 that is provided for free and have a look at users' reviews on Droid Informer. The app is built for Android 4.0 and above. The download of this application doesn't contain viruses or any kind of malware. Ant. Vonderka created the tool that falls into the Educational category.
Čj was downloaded and installed by over 100 users and the most recent stable release was on Mar 10, 2017. The overall user rating of the app is 4.8.