You are looking for the Kerio Connect Sync App in Android but you are unable to find it. You wish to know if Kerio Connect still offers an official Android app on Play Store.
The Kerio Connect Sync app has been removed from the Google Play store, as it is no longer officially supported. You can still use third-party CalDAV/ CardDAV apps - two of these are noted on the article Configuring CalDAV/CardDAV accounts in Android. As the article observes, please note that GFI/Kerio has no affiliation with these application vendors and does not provide support for such applications.
If the apps listed in the above article do not work for you, you can continue to look for one that does work or simply use an Exchange ActiveSync connection with your Android phone's native app (Gmail).
If you would like to see a new native Android application for Kerio Connect, please use the following article which describes the process of submitting a request to our Development Team for their consideration: How to submit a feature request