It's secure to download the app. Kyivstar is the developer of Мій Київстар 1.0 which can be found in the Productivity category. On Google Play, the tool is rated 2.1 by its users.
This application was downloaded and installed by over 100K users and its most recent stable release was on Oct 24, 2018. You can download the setup package of Мій Київстар 1.0 1.0.1 for free and read users' reviews on Droid Informer. The app runs on Android 4.1 and above.