How can I limit the max FPS for an app that doesn't have an FPS option I'm trying to limit the max framerate for multiple apps which don't have built-in FPS options. Is there any tool (terminal or app) which can set this?

I've tried searching, but haven't found anything.

I'm running macOS Sierra.
No, there's no generic mechanism to limit FPS for any app. It is completely up to each app to decide how many times per second it redraws its display.