This App will show you in real time your device's screen refresh rate and display it's type if it's a fixed refresh rate screen or an adaptive dynamic refresh rate and will check if your device display is a game-ready display with more than 60Hz.

In addition to that with this tool you can force to change the refresh rate to costume Refresh Rate value (this one work on limited devices like "Galaxy S20" and S20 Plus)

More features coming stay tuned !