Sloy is the official developer of SeviBus that can be found in the Maps & Navigation category. The tool has been downloaded and installed by over 100K users and the most recent update is dated Nov 13, 2018. This application has the average rating 3.7 on Google Play.
You can get the installation package of SeviBus 3.8 for free and have a look at users' reviews on Droid Informer. The app works fine on Android 5.0 and higher. It's secure to download the app.