The download of the app doesn't contain viruses or any kind of malware. Boris J developed Tvrđava Petrovaradin that falls into the Travel & Local category. The tool has been downloaded and set up by over 0,5K users and its latest release is dated Oct 17, 2016.
Users rated this application 4.9 on Google Play. Take the opportunity to get the installation package of Tvrđava Petrovaradin 1.3 free of charge and have a look at users' reviews on Droid Informer. The app is available for Android 4.0 and above.