If your FFT graph does not appear, this means your frequency display setting may be turned off. Please note the cord must be cable connected for the frequency settings to appear. 

To change your frequency display settings, navigate to settings on the app and check all the boxes under the "Frequency Display Settings", most importantly "save to record".

You will now see the FFT graph on the dashboard. If that doesn't work, you may have an old version of the app and will need to update it on the Google Play Store. Please check your cable connection as it may not be stable. You will need to disconnect and reconnect the cable.