We are working with cloud environment with 6.4 version.
Is it compatible to work with health check app? as it was mentioned in the splunk base doc that it is compatible with 6.1 version only.
you meant Splunk App for ES Health Check
it says splunk versions supported as
or, if you meant, Splunk Health Check Overview
it says splunk versions supported as 6.1 and 6.2
also, you should contact splunk cloud customer support to find out whether you can use this app with Splunk Cloud at all (I suspect not).