I also like Airdata as an electronic flight/maintenance logbook. For the OP, I started using it under a free account, learned the capabilities and interface, then signed up for the Pro account. I love the analysis that Airdata provides and I regularly print out my flight/maintenance logs to keep in my drone bag.
There was a problem with the DJI software this fall that caused Airdata not to download data, but DJI corrected that a few months ago.
Sorry, I haven't tried Kittyhawk so I am not the one to provide you with a comparison.