The download of the app is safe and secure. Do-Fi has created Hej SOS that lies within the Educational category. According to the latest data, the tool is rated 5 on Google Play.
Over 5K users downloaded and installed this application and the most recent release was on Jan 26, 2017. It's free of charge to download the installer of Hej SOS, also, you can check out users' reviews on Droid Informer. The app works fine on Android 4.0 and above.