Good news! Your EM3330 meter is compatible with the Powerpal
The pulse rate to enter into the app is 1000 and you can use the square mounting bracket to attach your Powerpal to your meter.
Simply attach the rectangular-shaped mounting bracket over the output in the top centre of your meter (marked with a red arrow) so you can see the transmitter through the hole in the bracket.
Then gently twist your Powerpal's sensor clockwise into place.
Once the sensor is in place head to https://www.powerpal.net/install and follows the instructions to complete your installation.