I’m specifically looking for an app that can start a 0.2-second timer with the press of a key. Any recommendations?
AutoHotkey is the way to go! It’s a super useful scripting tool for Windows that lets you create custom keyboard shortcuts. You can easily whip up a quick script to start a 0.2-second timer with just a key press.
I would prefer nircmd, This is a small command-line tool that can do all sorts of things. You can use it with a script or batch file to set up a fast 0.2-second timer.