A free program for Android, by Zincotech.

FPS Meter No Root is an app that will help you calculate real-time frames per second (FPS) across your mobile devices. This app can be used to calculate FPS on both Android and iOS devices and can be used to compare FPS on different devices. This app is useful for both casual and hardcore gamers and can be used to calculate the FPS of your games. The app has a simple and intuitive interface and can be used with either an Android or iOS device.

To use FPS Meter No Root, first, open the application and select either Android or iOS. Next, select the game you want to test and press Start.