You can get the installer of CallYa Flex 1.6 free of charge and check out users' reviews on Droid Informer. The app works fine on Android 4.0.3 and above. This application is totally safe for downloading. Vodafone GmbH is the creator of CallYa Flex which can be found in the Tools category.
Over 100K users downloaded and set up the app and its most recent update was on Mar 7, 2019. People rated this application 1.9 on Google Play.