Yes, to use the app on your PC, you have to download an emulator first. To do this, visit the official site of BlueStacks by using the above link. Proceed with the download button to save an installer file. When done, select it and hit enter to run the installation setup.
Now use the Cheat Engine Apk link, drag and drop it in the BlueStacks home screen to install the app. That's it, head to the My Games tab and double click on the app icon to launch.