Hi Warner,
We used CrowdCompass up through last year, until it was taken away. As you can see below, this info you are seeking was available, but is no longer visible in my account. Perhaps your case may be different. This below dashboard shows you not just the number of verified users, but what types of devices they used and for how long. Unfortunately, I can't give you instructions, but perhaps this information can still be accessed through your rep.
Thanks,
Jeremy
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Jeremy Houser
Projects Coordinator
Duke University
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