Rivarna was originally created by Profundis and it relates to the Business category. The tool was downloaded and set up by over 10 users and the latest stable release was on Feb 9, 2017. Google Play shows that this application is rated 4.5 by its users.
It's free to download the installation package of Rivarna, also, you can take a look at users' reviews on Droid Informer. The app works fine on Android 1.6 and higher. The download of the app doesn't contain viruses or any kind of malware.