Sorry I have only just seen this, but you can do this by using the .QVD that the Operations Monitor app writes to. I did this, starting by reviewing the loadscript for Operations Monitor (duplicated). You may need to grant your account access to the internal data connections (be careful not to grant this access to everyone).
You will see that QlikSense has Rest Connector that accesses the QRS and imports information and that there is a subroutine "sessionSummary" that processes it (conveniently in a tab called "SUB sessionSummary"). You just need to add these two to your app to pull in the data in question.