You can review the system requirements page for this information:
And it depends on what component you're referring to as well. But regardless the only versions for RHEL I see anywhere on the page go up to 7.2. For the server it only lists Linux x64 with support for Java 8 as the requirements.
Under Appmon Server section it says supports 2.6 and aove kernel for Linux x64 does that mean it supports RHEL v7.4 as per Red Hat docuementation for RHEL v7.4 kernel is v3.*
Linux x64: With a recent kernel version 2.6 or higher.
Installation requires a pre-installed Java Runtime Edition v8.