Using this app, you can send donation to tribalfs on XDA for those who can't donate using PayPal. Donation will also unlock GMH's premium features on your particular device* as provided by tribalfs on XDA developers forum. Galaxy Max Hz is created primarily for Samsung devices. Compatibility with other brands is not guaranteed. Some features may not work. Galaxy Max Hz features: Refresh Rate Features - Adjust minimum and maximum refresh rates - Switch between adaptive and high(stationary) ref